diff --git a/ZR.Admin.WebApi/Controllers/System/SysLoginController.cs b/ZR.Admin.WebApi/Controllers/System/SysLoginController.cs
index e6d88804d8606f30dd69cad2da1e1fd216381c3c..f5a0fa04185e01e593c74fd334012c88d85324f8 100644
--- a/ZR.Admin.WebApi/Controllers/System/SysLoginController.cs
+++ b/ZR.Admin.WebApi/Controllers/System/SysLoginController.cs
@@ -1,4 +1,4 @@
-using Lazy.Captcha.Core;
+using Lazy.Captcha.Core;
 using Microsoft.AspNetCore.Mvc;
 using ZR.Admin.WebApi.Filters;
 using ZR.Infrastructure.Helper;
@@ -141,9 +141,9 @@ namespace ZR.Admin.WebApi.Controllers.System
 
             SysConfig sysConfig = sysConfigService.GetSysConfigByKey("sys.account.captchaOnOff");
             var captchaOff = sysConfig?.ConfigValue ?? "0";
-            var info = SecurityCodeHelper.Generate(uuid, 60);
-            var obj = new { captchaOff, uuid, img = info.Base64 };// File(stream, "image/png")
-
+            CaptchaData? info = null;
+            if(captchaOff == "0") info = SecurityCodeHelper.Generate(uuid, 60);
+            var obj = new { captchaOff, uuid, img = info?.Base64 };// File(stream, "image/png")
             return SUCCESS(obj);
         }