diff --git a/yuthon_base/models/res_users.py b/yuthon_base/models/res_users.py
index c3447cd4e..e8026b390 100644
--- a/yuthon_base/models/res_users.py
+++ b/yuthon_base/models/res_users.py
@@ -5,10 +5,36 @@ from odoo import api, models
 class ResUsers(models.Model):
     _inherit = 'res.users'
 
+    @api.model
+    def default_get(self, fields_list):
+        res = super().default_get(fields_list)
+        # 新建用户时默认不勾选财务管理员权限组
+        if 'groups_id' in res:
+            group_manager = self.env.ref('account.group_account_manager', raise_if_not_found=False)
+            group_invoice = self.env.ref('account.group_account_invoice', raise_if_not_found=False)
+            groups_to_remove = set()
+            if group_manager:
+                groups_to_remove.add(group_manager.id)
+            if group_invoice:
+                groups_to_remove.add(group_invoice.id)
+            if groups_to_remove:
+                # groups_id 在 default_get 中可能是 [(6, 0, [ids])] 或 [ids] 格式
+                groups_value = res['groups_id']
+                if groups_value and isinstance(groups_value[0], (list, tuple)):
+                    # [(6, 0, [ids])] 格式
+                    for i, cmd in enumerate(groups_value):
+                        if cmd[0] == 6:
+                            filtered_ids = [gid for gid in cmd[2] if gid not in groups_to_remove]
+                            groups_value[i] = (6, 0, filtered_ids)
+                else:
+                    # [ids] 格式
+                    res['groups_id'] = [gid for gid in groups_value if gid not in groups_to_remove]
+        return res
+
     @api.model_create_multi
     def create(self, vals_list):
         users = super().create(vals_list)
-        # 新建用户后移除财务管理员权限组
+        # 新建用户后再次确保移除财务管理员权限组
         groups_to_remove = []
         group_manager = self.env.ref('account.group_account_manager', raise_if_not_found=False)
         group_invoice = self.env.ref('account.group_account_invoice', raise_if_not_found=False)