diff --git a/src/services/claudeConsoleRelayService.js b/src/services/claudeConsoleRelayService.js
index 40a8b02d..6acec739 100644
--- a/src/services/claudeConsoleRelayService.js
+++ b/src/services/claudeConsoleRelayService.js
@@ -79,6 +79,12 @@ class ClaudeConsoleRelayService {
       const filteredHeaders = this._filterClientHeaders(clientHeaders);
       logger.debug(`[DEBUG] Filtered client headers: ${JSON.stringify(filteredHeaders)}`);
       
+      // 决定使用的 User-Agent：优先使用账户自定义的，否则透传客户端的，最后才使用默认值
+      const userAgent = account.userAgent || 
+                       clientHeaders?.['user-agent'] || 
+                       clientHeaders?.['User-Agent'] || 
+                       this.defaultUserAgent;
+      
       // 准备请求配置
       const requestConfig = {
         method: 'POST',
@@ -87,7 +93,7 @@ class ClaudeConsoleRelayService {
         headers: {
           'Content-Type': 'application/json',
           'anthropic-version': '2023-06-01',
-          'User-Agent': account.userAgent || this.defaultUserAgent,
+          'User-Agent': userAgent,
           ...filteredHeaders
         },
         httpsAgent: proxyAgent,
@@ -231,6 +237,12 @@ class ClaudeConsoleRelayService {
       const filteredHeaders = this._filterClientHeaders(clientHeaders);
       logger.debug(`[DEBUG] Filtered client headers: ${JSON.stringify(filteredHeaders)}`);
       
+      // 决定使用的 User-Agent：优先使用账户自定义的，否则透传客户端的，最后才使用默认值
+      const userAgent = account.userAgent || 
+                       clientHeaders?.['user-agent'] || 
+                       clientHeaders?.['User-Agent'] || 
+                       this.defaultUserAgent;
+      
       // 准备请求配置
       const requestConfig = {
         method: 'POST',
@@ -239,7 +251,7 @@ class ClaudeConsoleRelayService {
         headers: {
           'Content-Type': 'application/json',
           'anthropic-version': '2023-06-01',
-          'User-Agent': account.userAgent || this.defaultUserAgent,
+          'User-Agent': userAgent,
           ...filteredHeaders
         },
         httpsAgent: proxyAgent,
diff --git a/web/admin-spa/src/components/accounts/AccountForm.vue b/web/admin-spa/src/components/accounts/AccountForm.vue
index 9802bed7..2f45e5b6 100644
--- a/web/admin-spa/src/components/accounts/AccountForm.vue
+++ b/web/admin-spa/src/components/accounts/AccountForm.vue
@@ -496,8 +496,11 @@
                   v-model="form.userAgent" 
                   type="text" 
                   class="form-input w-full"
-                  placeholder="默认：claude-cli/1.0.61 (console, cli)"
+                  placeholder="留空则透传客户端 User-Agent"
                 >
+                <p class="text-xs text-gray-500 mt-1">
+                  留空时将自动使用客户端的 User-Agent，仅在需要固定特定 UA 时填写
+                </p>
               </div>
               
               <div>
@@ -853,8 +856,11 @@
                 v-model="form.userAgent" 
                 type="text" 
                 class="form-input w-full"
-                placeholder="默认：claude-cli/1.0.61 (console, cli)"
+                placeholder="留空则透传客户端 User-Agent"
               >
+              <p class="text-xs text-gray-500 mt-1">
+                留空时将自动使用客户端的 User-Agent，仅在需要固定特定 UA 时填写
+              </p>
             </div>
             
             <div>