diff --git a/YLErpDAL/Helpers/AuthHelper.cs b/YLErpDAL/Helpers/AuthHelper.cs
index 3f88374c..d31b636f 100644
--- a/YLErpDAL/Helpers/AuthHelper.cs
+++ b/YLErpDAL/Helpers/AuthHelper.cs
@@ -36,9 +36,16 @@ namespace YLErp.Helpers
         {
             var key = new SymmetricSecurityKey(Encoding.ASCII.GetBytes(JwtSecretKey));
 
+            // 添加 JTI (JWT ID) 用于黑名单机制
+            var claims = new ClaimsIdentity(identity);
+            if (!claims.HasClaim(c => c.Type == "jti"))
+            {
+                claims.AddClaim(new Claim("jti", Guid.NewGuid().ToString("N")));
+            }
+
             var tokenDescriptor = new SecurityTokenDescriptor
             {
-                Subject = new ClaimsIdentity(identity),
+                Subject = claims,
                 Expires = DateTime.UtcNow.AddSeconds(ExpireInSeconds),
                 Issuer = JwtIssuer,
                 Audience = JwtAudience,