diff --git a/application/agent/controller/Agent.php b/application/agent/controller/Agent.php
index 11ee619..6178550 100755
--- a/application/agent/controller/Agent.php
+++ b/application/agent/controller/Agent.php
@@ -565,12 +565,24 @@ class Agent Extends Common{
             if(!$user || $user['agent'] == 0){
                 die(json_encode(['code'=>0,'msg'=>$lang['error_id']]));
             }
+            // 顶级代理(agent_parent_id=0)无真实上级：构造一个不设限的虚拟上级，使所有"不得高于上级"封顶校验自动放行；
+            // "不得低于下级"封底校验与写入逻辑保持不变(顶级代理仍受其下级最高费率约束)。
             if($parent_id <= 0){
-                die(json_encode(['code'=>0,'msg'=>$lang['parent_error']]));
-            }
-            $agentParent = Db::name('user')->where('id',$parent_id)->find();
-            if(!$agentParent || $agentParent['agent'] == 0){
-                die(json_encode(['code'=>0,'msg'=>$lang['parent_error']]));
+                $agentParent = [
+                    'limit_low' => 0, 'limit_high' => 99999999999,
+                    'limit_low_tie' => 0, 'limit_high_tie' => 99999999999,
+                    'limit_low_pair' => 0, 'limit_high_pair' => 99999999999,
+                    'limit_low_nn' => 0, 'limit_high_nn' => 0,
+                    'agent_ximalv' => 100, 'agent_ximalv_dt' => 100,
+                    'agent_ximalv_nn' => 100, 'agent_ximalv_tc' => 100,
+                    'agent_cs' => 100, 'rebate_rate' => 100,
+                    'agent_parent_id' => 0,
+                ];
+            }else{
+                $agentParent = Db::name('user')->where('id',$parent_id)->find();
+                if(!$agentParent || $agentParent['agent'] == 0){
+                    die(json_encode(['code'=>0,'msg'=>$lang['parent_error']]));
+                }
             }
             if(!$nickname){
                 die(json_encode(['code'=>0,'msg'=>$lang['empty_nickname']]));