diff --git a/internal/logic/tenant/email.go b/internal/logic/tenant/email.go
index 887e7c0..01a42a1 100644
--- a/internal/logic/tenant/email.go
+++ b/internal/logic/tenant/email.go
@@ -128,6 +128,11 @@ func (s *sTenant) ChangeEmail(ctx context.Context, req *v1.TenantChangeEmailReq)
 	userID := middleware.GetUserID(ctx)
 	newEmail := strings.TrimSpace(strings.ToLower(req.NewEmail))
 
+	// Reject no-op: block if the new email equals the user's current email.
+	if err := rejectSameEmail(ctx, userID, newEmail); err != nil {
+		return nil, err
+	}
+
 	// Verify code for new email
 	err := common.VerifyCode(ctx, newEmail, req.Code, "change_email")
 	if err != nil {
@@ -209,6 +214,11 @@ func (s *sTenant) SendChangeEmailCode(ctx context.Context, req *v1.TenantSendCha
 	userID := middleware.GetUserID(ctx)
 	newEmail := strings.TrimSpace(strings.ToLower(req.NewEmail))
 
+	// Reject no-op: block if the new email equals the user's current email.
+	if err := rejectSameEmail(ctx, userID, newEmail); err != nil {
+		return nil, err
+	}
+
 	// Pre-check: reject early if the email is already used by another member in this tenant.
 	count, err := dao.TntUsers.Ctx(ctx).
 		Where("tenant_id", tenantID).
@@ -227,3 +237,25 @@ func (s *sTenant) SendChangeEmailCode(ctx context.Context, req *v1.TenantSendCha
 	}
 	return nil, nil
 }
+
+// rejectSameEmail blocks a no-op email change: if newEmail equals the user's
+// current email there's nothing to do, so refuse before sending a code (and a
+// pointless notification email) or performing an identical update. A user with
+// no email yet (NULL/empty) may still set any valid address.
+func rejectSameEmail(ctx context.Context, userID int64, newEmail string) error {
+	if newEmail == "" {
+		return nil
+	}
+	var me struct {
+		Email string `json:"email"`
+	}
+	if err := dao.TntUsers.Ctx(ctx).Where("id", userID).Fields("email").Scan(&me); err != nil {
+		if err = common.IgnoreScanNoRows(err); err != nil {
+			return err
+		}
+	}
+	if me.Email != "" && me.Email == newEmail {
+		return common.NewBadRequestError("新邮箱与当前邮箱一致，无需修改")
+	}
+	return nil
+}
diff --git a/web/tenant/src/utils/request.ts b/web/tenant/src/utils/request.ts
index f220baa..1a313cd 100644
--- a/web/tenant/src/utils/request.ts
+++ b/web/tenant/src/utils/request.ts
@@ -16,7 +16,7 @@ interface ApiError {
 
 /** Request config extension — set _suppressErrorMsg to skip auto error toast */
 declare module 'axios' {
-  interface InternalAxiosRequestConfig {
+  interface AxiosRequestConfig {
     _suppressErrorMsg?: boolean
   }
 }
diff --git a/web/tenant/src/views/settings/ProfilePage.vue b/web/tenant/src/views/settings/ProfilePage.vue
index f713980..e9053b7 100644
--- a/web/tenant/src/views/settings/ProfilePage.vue
+++ b/web/tenant/src/views/settings/ProfilePage.vue
@@ -161,7 +161,7 @@ async function sendEmailCode() {
 	try {
 		await request.post('/tenant/email/send-change-email-code', {
 			new_email: emailForm.new_email,
-		})
+		}, { _suppressErrorMsg: true })
 		emailCooldown.value = 60
 		emailCooldownTimer = setInterval(() => {
 			emailCooldown.value--
@@ -171,7 +171,7 @@ async function sendEmailCode() {
 			}
 		}, 1000)
 	} catch (e: any) {
-		emailError.value = e?.response?.data?.message || '验证码发送失败'
+		emailError.value = e?.message || '验证码发送失败'
 	} finally {
 		emailSending.value = false
 	}
@@ -192,7 +192,7 @@ async function handleChangeEmail() {
 		await request.post('/tenant/email/change-email', {
 			new_email: emailForm.new_email,
 			code: emailForm.code,
-		})
+		}, { _suppressErrorMsg: true })
 		if (userInfo.value) {
 			userInfo.value.email = emailForm.new_email
 		}
@@ -202,7 +202,7 @@ async function handleChangeEmail() {
 			emailCooldownTimer = null
 		}
 	} catch (e: any) {
-		emailError.value = e?.response?.data?.message || '设置失败'
+		emailError.value = e?.message || '设置失败'
 	} finally {
 		emailSaving.value = false
 	}