diff --git a/Learn.Archives.API/Controllers/StudentController.cs b/Learn.Archives.API/Controllers/StudentController.cs
index a4d6d0f..2a6bd21 100644
--- a/Learn.Archives.API/Controllers/StudentController.cs
+++ b/Learn.Archives.API/Controllers/StudentController.cs
@@ -498,7 +498,14 @@ namespace Learn.Archives.API.Controllers
                 }, ex => { throw ex; });
             }
             //写入选科方向
+            userCenterUpdate = userCenterUpdate.Where(s =>
+            new object[] { s.Phone,
+                    s.GLSubject,
+                    s.GSubject1,
+                    s.GSubject2,}
+            .Any(x => !(x == default || x == null))).ToList();
             if (userCenterUpdate.Count > 0)
+            {
                 await userService.AsUpdateable(userCenterUpdate)
                     .UpdateColumns(s => new
                     {
@@ -511,6 +518,7 @@ namespace Learn.Archives.API.Controllers
                     .IgnoreColumns(ignoreAllNullColumns: true, ignoreAllDefaultValue: true)
                     .WhereColumns(it => new { it.Id })
                     .ExecuteCommandAsync();
+            }
             return Ok();
         }