diff --git a/internal/applicant/acme-ca.go b/internal/applicant/acme-ca.go
index ce6e3006..57f24b6e 100644
--- a/internal/applicant/acme-ca.go
+++ b/internal/applicant/acme-ca.go
@@ -1,22 +1,25 @@
 package applicant
 
-const defaultSSLProvider = "letsencrypt"
 const (
-	sslProviderLetsencrypt = "letsencrypt"
-	sslProviderZeroSSL     = "zerossl"
-	sslProviderGts         = "gts"
+	sslProviderLetsEncrypt         = "letsencrypt"
+	sslProviderLetsEncryptStaging  = "letsencrypt_staging"
+	sslProviderZeroSSL             = "zerossl"
+	sslProviderGoogleTrustServices = "gts"
 )
+const defaultSSLProvider = sslProviderLetsEncrypt
 
 const (
-	zerosslUrl     = "https://acme.zerossl.com/v2/DV90"
-	letsencryptUrl = "https://acme-v02.api.letsencrypt.org/directory"
-	gtsUrl         = "https://dv.acme-v02.api.pki.goog/directory"
+	letsencryptUrl        = "https://acme-v02.api.letsencrypt.org/directory"
+	letsencryptStagingUrl = "https://acme-staging-v02.api.letsencrypt.org/directory"
+	zerosslUrl            = "https://acme.zerossl.com/v2/DV90"
+	gtsUrl                = "https://dv.acme-v02.api.pki.goog/directory"
 )
 
 var sslProviderUrls = map[string]string{
-	sslProviderLetsencrypt: letsencryptUrl,
-	sslProviderZeroSSL:     zerosslUrl,
-	sslProviderGts:         gtsUrl,
+	sslProviderLetsEncrypt:         letsencryptUrl,
+	sslProviderLetsEncryptStaging:  letsencryptStagingUrl,
+	sslProviderZeroSSL:             zerosslUrl,
+	sslProviderGoogleTrustServices: gtsUrl,
 }
 
 type acmeSSLProviderConfig struct {
@@ -25,11 +28,11 @@ type acmeSSLProviderConfig struct {
 }
 
 type acmeSSLProviderConfigContent struct {
-	Zerossl acmeSSLProviderEab `json:"zerossl"`
-	Gts     acmeSSLProviderEab `json:"gts"`
+	ZeroSSL             acmeSSLProviderEabConfig `json:"zerossl"`
+	GoogleTrustServices acmeSSLProviderEabConfig `json:"gts"`
 }
 
-type acmeSSLProviderEab struct {
+type acmeSSLProviderEabConfig struct {
 	EabHmacKey string `json:"eabHmacKey"`
 	EabKid     string `json:"eabKid"`
 }
diff --git a/internal/applicant/acme-user.go b/internal/applicant/acme-user.go
index dd3de89f..11aa1fff 100644
--- a/internal/applicant/acme-user.go
+++ b/internal/applicant/acme-user.go
@@ -5,7 +5,6 @@ import (
 	"crypto/ecdsa"
 	"crypto/elliptic"
 	"crypto/rand"
-	"errors"
 	"fmt"
 
 	"github.com/go-acme/lego/v4/lego"
@@ -39,12 +38,12 @@ func newAcmeUser(ca, email string) (*acmeUser, error) {
 			return nil, err
 		}
 
-		keyStr, err := x509.ConvertECPrivateKeyToPEM(key)
+		keyPEM, err := x509.ConvertECPrivateKeyToPEM(key)
 		if err != nil {
 			return nil, err
 		}
 
-		applyUser.privkey = keyStr
+		applyUser.privkey = keyPEM
 		return applyUser, nil
 	}
 
@@ -80,30 +79,30 @@ type acmeAccountRepository interface {
 	Save(ca, email, key string, resource *registration.Resource) error
 }
 
-func registerAcmeUser(client *lego.Client, sslProvider *acmeSSLProviderConfig, user *acmeUser) (*registration.Resource, error) {
+func registerAcmeUser(client *lego.Client, sslProviderConfig *acmeSSLProviderConfig, user *acmeUser) (*registration.Resource, error) {
 	// TODO: fix 潜在的并发问题
 
 	var reg *registration.Resource
 	var err error
-	switch sslProvider.Provider {
+	switch sslProviderConfig.Provider {
 	case sslProviderZeroSSL:
 		reg, err = client.Registration.RegisterWithExternalAccountBinding(registration.RegisterEABOptions{
 			TermsOfServiceAgreed: true,
-			Kid:                  sslProvider.Config.Zerossl.EabKid,
-			HmacEncoded:          sslProvider.Config.Zerossl.EabHmacKey,
+			Kid:                  sslProviderConfig.Config.ZeroSSL.EabKid,
+			HmacEncoded:          sslProviderConfig.Config.ZeroSSL.EabHmacKey,
 		})
-	case sslProviderGts:
+	case sslProviderGoogleTrustServices:
 		reg, err = client.Registration.RegisterWithExternalAccountBinding(registration.RegisterEABOptions{
 			TermsOfServiceAgreed: true,
-			Kid:                  sslProvider.Config.Gts.EabKid,
-			HmacEncoded:          sslProvider.Config.Gts.EabHmacKey,
+			Kid:                  sslProviderConfig.Config.GoogleTrustServices.EabKid,
+			HmacEncoded:          sslProviderConfig.Config.GoogleTrustServices.EabHmacKey,
 		})
 
-	case sslProviderLetsencrypt:
+	case sslProviderLetsEncrypt, sslProviderLetsEncryptStaging:
 		reg, err = client.Registration.Register(registration.RegisterOptions{TermsOfServiceAgreed: true})
 
 	default:
-		err = errors.New("unknown ssl provider")
+		err = fmt.Errorf("unsupported ssl provider: %s", sslProviderConfig.Provider)
 	}
 
 	if err != nil {
@@ -112,13 +111,13 @@ func registerAcmeUser(client *lego.Client, sslProvider *acmeSSLProviderConfig, u
 
 	repo := repository.NewAcmeAccountRepository()
 
-	resp, err := repo.GetByCAAndEmail(sslProvider.Provider, user.GetEmail())
+	resp, err := repo.GetByCAAndEmail(sslProviderConfig.Provider, user.GetEmail())
 	if err == nil {
 		user.privkey = resp.Key
 		return resp.Resource, nil
 	}
 
-	if err := repo.Save(sslProvider.Provider, user.GetEmail(), user.getPrivateKeyPEM(), reg); err != nil {
+	if err := repo.Save(sslProviderConfig.Provider, user.GetEmail(), user.getPrivateKeyPEM(), reg); err != nil {
 		return nil, fmt.Errorf("failed to save registration: %w", err)
 	}
 
diff --git a/internal/applicant/applicant.go b/internal/applicant/applicant.go
index 399bfa5f..8f32766e 100644
--- a/internal/applicant/applicant.go
+++ b/internal/applicant/applicant.go
@@ -77,29 +77,33 @@ func apply(challengeProvider challenge.Provider, applyConfig *applyConfig) (*App
 	settingsRepo := repository.NewSettingsRepository()
 	settings, _ := settingsRepo.GetByName(context.Background(), "sslProvider")
 
-	sslProvider := &acmeSSLProviderConfig{
+	sslProviderConfig := &acmeSSLProviderConfig{
 		Config:   acmeSSLProviderConfigContent{},
 		Provider: defaultSSLProvider,
 	}
 	if settings != nil {
-		if err := json.Unmarshal([]byte(settings.Content), sslProvider); err != nil {
+		if err := json.Unmarshal([]byte(settings.Content), sslProviderConfig); err != nil {
 			return nil, err
 		}
 	}
 
+	if sslProviderConfig.Provider == "" {
+		sslProviderConfig.Provider = defaultSSLProvider
+	}
+
+	myUser, err := newAcmeUser(sslProviderConfig.Provider, applyConfig.ContactEmail)
+	if err != nil {
+		return nil, err
+	}
+
 	// Some unified lego environment variables are configured here.
 	// link: https://github.com/go-acme/lego/issues/1867
 	os.Setenv("LEGO_DISABLE_CNAME_SUPPORT", strconv.FormatBool(applyConfig.DisableFollowCNAME))
 
-	myUser, err := newAcmeUser(sslProvider.Provider, applyConfig.ContactEmail)
-	if err != nil {
-		return nil, err
-	}
-
 	config := lego.NewConfig(myUser)
 
 	// This CA URL is configured for a local dev instance of Boulder running in Docker in a VM.
-	config.CADirURL = sslProviderUrls[sslProvider.Provider]
+	config.CADirURL = sslProviderUrls[sslProviderConfig.Provider]
 	config.Certificate.KeyType = parseKeyAlgorithm(applyConfig.KeyAlgorithm)
 
 	// A client facilitates communication with the CA server.
@@ -118,29 +122,29 @@ func apply(challengeProvider challenge.Provider, applyConfig *applyConfig) (*App
 
 	// New users will need to register
 	if !myUser.hasRegistration() {
-		reg, err := registerAcmeUser(client, sslProvider, myUser)
+		reg, err := registerAcmeUser(client, sslProviderConfig, myUser)
 		if err != nil {
 			return nil, fmt.Errorf("failed to register: %w", err)
 		}
 		myUser.Registration = reg
 	}
 
-	request := certificate.ObtainRequest{
+	certRequest := certificate.ObtainRequest{
 		Domains: strings.Split(applyConfig.Domains, ";"),
 		Bundle:  true,
 	}
-	certificates, err := client.Certificate.Obtain(request)
+	certResource, err := client.Certificate.Obtain(certRequest)
 	if err != nil {
 		return nil, err
 	}
 
 	return &ApplyCertResult{
-		PrivateKey:        string(certificates.PrivateKey),
-		Certificate:       string(certificates.Certificate),
-		IssuerCertificate: string(certificates.IssuerCertificate),
-		CSR:               string(certificates.CSR),
-		ACMECertUrl:       certificates.CertURL,
-		ACMECertStableUrl: certificates.CertStableURL,
+		PrivateKey:        string(certResource.PrivateKey),
+		Certificate:       string(certResource.Certificate),
+		IssuerCertificate: string(certResource.IssuerCertificate),
+		CSR:               string(certResource.CSR),
+		ACMECertUrl:       certResource.CertURL,
+		ACMECertStableUrl: certResource.CertStableURL,
 	}, nil
 }
 
diff --git a/ui/src/domain/settings.ts b/ui/src/domain/settings.ts
index a27e61e1..9df3dc05 100644
--- a/ui/src/domain/settings.ts
+++ b/ui/src/domain/settings.ts
@@ -133,13 +133,11 @@ export const notifyChannelsMap: Map<NotifyChannel["type"], NotifyChannel> = new
 // #endregion
 
 // #region Settings: SSLProvider
-export const SSLPROVIDER_LETSENCRYPT = "letsencrypt" as const;
-export const SSLPROVIDER_ZEROSSL = "zerossl" as const;
-export const SSLPROVIDER_GOOGLETRUSTSERVICES = "gts" as const;
 export const SSLPROVIDERS = Object.freeze({
-  LETS_ENCRYPT: SSLPROVIDER_LETSENCRYPT,
-  ZERO_SSL: SSLPROVIDER_ZEROSSL,
-  GOOGLE_TRUST_SERVICES: SSLPROVIDER_GOOGLETRUSTSERVICES,
+  LETS_ENCRYPT: "letsencrypt",
+  LETS_ENCRYPT_STAGING: "letsencrypt_staging",
+  ZERO_SSL: "zerossl",
+  GOOGLE_TRUST_SERVICES: "gts",
 } as const);
 
 export type SSLProviders = (typeof SSLPROVIDERS)[keyof typeof SSLPROVIDERS];
@@ -148,9 +146,10 @@ export type SSLProviderSettingsContent = {
   provider: (typeof SSLPROVIDERS)[keyof typeof SSLPROVIDERS];
   config: {
     [key: string]: Record<string, unknown> | undefined;
-    letsencrypt?: SSLProviderLetsEncryptConfig;
-    zerossl?: SSLProviderZeroSSLConfig;
-    gts?: SSLProviderGoogleTrustServicesConfig;
+    [SSLPROVIDERS.LETS_ENCRYPT]?: SSLProviderLetsEncryptConfig;
+    [SSLPROVIDERS.LETS_ENCRYPT_STAGING]?: SSLProviderLetsEncryptConfig;
+    [SSLPROVIDERS.ZERO_SSL]?: SSLProviderZeroSSLConfig;
+    [SSLPROVIDERS.GOOGLE_TRUST_SERVICES]?: SSLProviderGoogleTrustServicesConfig;
   };
 };
 
diff --git a/ui/src/i18n/locales/en/nls.settings.json b/ui/src/i18n/locales/en/nls.settings.json
index 7778369c..68b93ec5 100644
--- a/ui/src/i18n/locales/en/nls.settings.json
+++ b/ui/src/i18n/locales/en/nls.settings.json
@@ -73,6 +73,12 @@
 
   "settings.sslprovider.tab": "Certificate authority",
   "settings.sslprovider.form.provider.label": "ACME provider",
+  "settings.sslprovider.form.provider.option.letsencrypt.label": "Let's Encrypt",
+  "settings.sslprovider.form.provider.option.letsencrypt_staging.label": "Let's Encrypt Staging Environment",
+  "settings.sslprovider.form.provider.option.zerossl.label": "ZeroSSL",
+  "settings.sslprovider.form.provider.option.gts.label": "Google Trust Services",
+  "settings.sslprovider.form.letsencrypt_staging_alert": "The staging environment can reduce the chance of your running up against rate limits.<br><br>Learn more:<br><a href=\"https://letsencrypt.org/docs/staging-environment/\" target=\"_blank\">https://letsencrypt.org/docs/staging-environment/</a>",
+  "settings.sslprovider.form.letsencrypt_staging_warning": "Attention: Certificates from the staging environment are only for testing purposes.",
   "settings.sslprovider.form.zerossl_eab_kid.label": "EAB KID",
   "settings.sslprovider.form.zerossl_eab_kid.placeholder": "Please enter EAB KID",
   "settings.sslprovider.form.zerossl_eab_kid.tooltip": "For more information, see <a href=\"https://zerossl.com/documentation/acme/\" target=\"_blank\">https://zerossl.com/documentation/acme/</a>",
diff --git a/ui/src/i18n/locales/zh/nls.settings.json b/ui/src/i18n/locales/zh/nls.settings.json
index 50b871c4..c8d4703a 100644
--- a/ui/src/i18n/locales/zh/nls.settings.json
+++ b/ui/src/i18n/locales/zh/nls.settings.json
@@ -72,7 +72,13 @@
   "settings.notification.channel.form.wecom_webhook_url.tooltip": "这是什么？请参阅 <a href=\"https://open.work.weixin.qq.com/help2/pc/18401#%E5%85%AD%E3%80%81%E7%BE%A4%E6%9C%BA%E5%99%A8%E4%BA%BAWebhook%E5%9C%B0%E5%9D%80\" target=\"_blank\">https://open.work.weixin.qq.com/help2/pc/18401</a>",
 
   "settings.sslprovider.tab": "证书颁发机构（CA）",
-  "settings.sslprovider.form.provider.label": "ACME 提供商",
+  "settings.sslprovider.form.provider.label": "ACME 服务商",
+  "settings.sslprovider.form.provider.option.letsencrypt.label": "Let's Encrypt",
+  "settings.sslprovider.form.provider.option.letsencrypt_staging.label": "Let's Encrypt 测试环境",
+  "settings.sslprovider.form.provider.option.zerossl.label": "ZeroSSL",
+  "settings.sslprovider.form.provider.option.gts.label": "Google Trust Services",
+  "settings.sslprovider.form.letsencrypt_staging_alert": "测试环境比生产环境有更宽松的速率限制，可进行测试性部署。<br><br>点击下方链接了解更多：<br><a href=\"https://letsencrypt.org/zh-cn/docs/staging-environment/\" target=\"_blank\">https://letsencrypt.org/zh-cn/docs/staging-environment/</a>",
+  "settings.sslprovider.form.letsencrypt_staging_warning": "警告：测试环境证书仅能用于测试目的。",
   "settings.sslprovider.form.zerossl_eab_kid.label": "EAB KID",
   "settings.sslprovider.form.zerossl_eab_kid.placeholder": "请输入 EAB KID",
   "settings.sslprovider.form.zerossl_eab_kid.tooltip": "这是什么？请参阅 <a href=\"https://zerossl.com/documentation/acme/\" target=\"_blank\">https://zerossl.com/documentation/acme/</a>",
diff --git a/ui/src/pages/settings/SettingsSSLProvider.tsx b/ui/src/pages/settings/SettingsSSLProvider.tsx
index 1314b086..c3a550f0 100644
--- a/ui/src/pages/settings/SettingsSSLProvider.tsx
+++ b/ui/src/pages/settings/SettingsSSLProvider.tsx
@@ -1,7 +1,7 @@
 import { createContext, useContext, useEffect, useMemo, useState } from "react";
 import { useTranslation } from "react-i18next";
 import { CheckCard } from "@ant-design/pro-components";
-import { Button, Form, Input, Skeleton, message, notification } from "antd";
+import { Alert, Button, Form, Input, Skeleton, message, notification } from "antd";
 import { createSchemaFieldRule } from "antd-zod";
 import { produce } from "immer";
 import { z } from "zod";
@@ -61,6 +61,55 @@ const SSLProviderEditFormLetsEncryptConfig = () => {
   );
 };
 
+const SSLProviderEditFormLetsEncryptStagingConfig = () => {
+  const { t } = useTranslation();
+
+  const { pending, settings, updateSettings } = useContext(SSLProviderContext);
+
+  const { form: formInst, formProps } = useAntdForm<NonNullable<unknown>>({
+    initialValues: settings?.content?.config?.[SSLPROVIDERS.LETS_ENCRYPT_STAGING],
+    onSubmit: async (values) => {
+      const newSettings = produce(settings, (draft) => {
+        draft.content ??= {} as SSLProviderSettingsContent;
+        draft.content.provider = SSLPROVIDERS.LETS_ENCRYPT_STAGING;
+
+        draft.content.config ??= {} as SSLProviderSettingsContent["config"];
+        draft.content.config[SSLPROVIDERS.LETS_ENCRYPT_STAGING] = values;
+      });
+      await updateSettings(newSettings);
+
+      setFormChanged(false);
+    },
+  });
+
+  const [formChanged, setFormChanged] = useState(false);
+  useEffect(() => {
+    setFormChanged(settings?.content?.provider !== SSLPROVIDERS.LETS_ENCRYPT_STAGING);
+  }, [settings?.content?.provider]);
+
+  const handleFormChange = () => {
+    setFormChanged(true);
+  };
+
+  return (
+    <Form {...formProps} form={formInst} disabled={pending} layout="vertical" onValuesChange={handleFormChange}>
+      <Form.Item>
+        <Alert type="info" message={<span dangerouslySetInnerHTML={{ __html: t("settings.sslprovider.form.letsencrypt_staging_alert") }}></span>} />
+      </Form.Item>
+
+      <Form.Item>
+        <Alert type="warning" message={<span dangerouslySetInnerHTML={{ __html: t("settings.sslprovider.form.letsencrypt_staging_warning") }}></span>} />
+      </Form.Item>
+
+      <Form.Item>
+        <Button type="primary" htmlType="submit" disabled={!formChanged} loading={pending}>
+          {t("common.button.save")}
+        </Button>
+      </Form.Item>
+    </Form>
+  );
+};
+
 const SSLProviderEditFormZeroSSLConfig = () => {
   const { t } = useTranslation();
 
@@ -231,6 +280,8 @@ const SettingsSSLProvider = () => {
     switch (providerType) {
       case SSLPROVIDERS.LETS_ENCRYPT:
         return <SSLProviderEditFormLetsEncryptConfig />;
+      case SSLPROVIDERS.LETS_ENCRYPT_STAGING:
+        return <SSLProviderEditFormLetsEncryptStagingConfig />;
       case SSLPROVIDERS.ZERO_SSL:
         return <SSLProviderEditFormZeroSSLConfig />;
       case SSLPROVIDERS.GOOGLE_TRUST_SERVICES:
@@ -272,14 +323,25 @@ const SettingsSSLProvider = () => {
               <CheckCard
                 avatar={<img src={"/imgs/acme/letsencrypt.svg"} className="size-8" />}
                 size="small"
-                title="Let's Encrypt"
+                title={t("settings.sslprovider.form.provider.option.letsencrypt.label")}
                 value={SSLPROVIDERS.LETS_ENCRYPT}
               />
-              <CheckCard avatar={<img src={"/imgs/acme/zerossl.svg"} className="size-8" />} size="small" title="ZeroSSL" value={SSLPROVIDERS.ZERO_SSL} />
+              <CheckCard
+                avatar={<img src={"/imgs/acme/letsencrypt.svg"} className="size-8" />}
+                size="small"
+                title={t("settings.sslprovider.form.provider.option.letsencrypt_staging.label")}
+                value={SSLPROVIDERS.LETS_ENCRYPT_STAGING}
+              />
+              <CheckCard
+                avatar={<img src={"/imgs/acme/zerossl.svg"} className="size-8" />}
+                size="small"
+                title={t("settings.sslprovider.form.provider.option.zerossl.label")}
+                value={SSLPROVIDERS.ZERO_SSL}
+              />
               <CheckCard
                 avatar={<img src={"/imgs/acme/google.svg"} className="size-8" />}
                 size="small"
-                title="Google Trust Services"
+                title={t("settings.sslprovider.form.provider.option.gts.label")}
                 value={SSLPROVIDERS.GOOGLE_TRUST_SERVICES}
               />
             </CheckCard.Group>