diff --git a/src/main/java/com/gxwebsoft/common/system/controller/UserRoleController.java b/src/main/java/com/gxwebsoft/common/system/controller/UserRoleController.java
index 692600a..4bc462a 100644
--- a/src/main/java/com/gxwebsoft/common/system/controller/UserRoleController.java
+++ b/src/main/java/com/gxwebsoft/common/system/controller/UserRoleController.java
@@ -63,9 +63,9 @@ public class UserRoleController extends BaseController {
   @Operation(summary = "添加用户角色")
   @PostMapping()
   public ApiResult<?> save(@RequestBody UserRole userRole) {
-    // 记录当前登录用户id
+    // 记录当前登录用户id（请求体未指定 userId 时，回退到当前登录用户）
     User loginUser = getLoginUser();
-    if (loginUser != null) {
+    if (userRole.getUserId() == null && loginUser != null) {
       userRole.setUserId(loginUser.getUserId());
     }
     if (userRoleService.save(userRole)) {