diff --git a/tianhe_approvals/models/__init__.py b/tianhe_approvals/models/__init__.py
index c64a4e2bc..c8a779511 100644
--- a/tianhe_approvals/models/__init__.py
+++ b/tianhe_approvals/models/__init__.py
@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 from . import inherit_approval_category
 from . import inherit_approval_request
+from . import overtime_approval
 from . import tianhe_construction_business_approval
 from . import tianhe_process_change_approval
 from . import tianhe_contentious_matter_approval
diff --git a/tianhe_approvals/models/inherit_approval_request.py b/tianhe_approvals/models/inherit_approval_request.py
index e515a5e0e..669396311 100644
--- a/tianhe_approvals/models/inherit_approval_request.py
+++ b/tianhe_approvals/models/inherit_approval_request.py
@@ -54,9 +54,8 @@ class ApprovalRequest(models.Model):
                                     ], string="用章类别")
     creation_time = fields.Datetime(string='创建时间', default=lambda self: fields.Datetime.now())
     department_id = fields.Many2one('hr.department', related="request_owner_id.employee_id.department_id", string="申请人部门")
-    overtime_department_id = fields.Many2one('hr.department', string="加班部门")
     approval_request_ids = fields.One2many('approval.request.line', 'approval_request_id', string="审批明细行")
-    overtime_user_ids = fields.One2many('overtime.user.line', 'approval_request_id', string="审批明细行")
+
 
 
 class ApprovalRequestLine(models.Model):
@@ -101,19 +100,5 @@ class ApprovalRequestLine(models.Model):
     # 加班
 
 
-class OvertimeUserLine(models.Model):
-    _name = 'overtime.user.line'
-    _rec_name = 'approval_request_id'
 
-    approval_request_id = fields.Many2one('approval.request', string="关联审批单")
-
-    user_id = fields.Many2one('res.users', string="请假人员")
-    start_time = fields.Datetime(string="开始时间")
-    end_time = fields.Datetime(string="结束时间")
-    overtime_hours = fields.Float(string="加班时长")
-    type_overtime = fields.Selection([('work', '工作日',), ('rest', '休息日',), ('holiday', '节假日')],
-                                     string="加班类型", default="work")
-    compensation_mode = fields.Selection([('salary', '薪资',), ('rest', '调休',)], string="补偿方式")
-    is_male_pay = fields.Boolean(string="加班餐费")
-    user_attendance = fields.Char(string="考勤信息")
 
diff --git a/tianhe_approvals/models/overtime_approval.py b/tianhe_approvals/models/overtime_approval.py
new file mode 100644
index 000000000..2ddc14365
--- /dev/null
+++ b/tianhe_approvals/models/overtime_approval.py
@@ -0,0 +1,55 @@
+# -*- coding: utf-8 -*-
+from odoo import api, fields, models, tools, _
+from datetime import datetime, time, timedelta
+
+
+class OvertimeApprovals(models.Model):
+    _inherit = 'approval.request'
+    _description = "加班审批"
+
+    overtime_department_id = fields.Many2one('hr.department', string="加班部门")
+    overtime_user_ids = fields.One2many('overtime.user.line', 'approval_request_id', string="审批明细行")
+
+    @api.onchange('overtime_department_id')
+    def onchange_overtime_users(self):
+        if self.approval_category_name == 'overtime_approval':
+            users_data_list = []
+            default_datetime = datetime.combine(datetime.now().date(), time(hour=17, minute=30)) - timedelta(hours=8),
+            for over in self:
+                if not over.overtime_department_id:
+                    users_data_list.append((0, 0, {
+                        'approval_request_id': over.id,
+                        'user_id': over.request_owner_id.id,
+                        'start_time': default_datetime[0],
+                        'type_overtime': 'work',
+                        'compensation_mode': 'salary',
+                    }))
+                else:
+                    employee_ids = self.env['hr.employee'].search([('department_id', '=', self.overtime_department_id.id)])
+                    for user in employee_ids:
+                        users_data_list.append((0, 0, {
+                            'approval_request_id': over.id,
+                            'user_id': user.user_id.id,
+                            'start_time': default_datetime[0],
+                            'type_overtime': 'work',
+                            'compensation_mode': 'salary',
+                        }))
+                over.overtime_user_ids = users_data_list
+
+
+class OvertimeUserLine(models.Model):
+    _name = 'overtime.user.line'
+    _rec_name = 'approval_request_id'
+    _description = "加班明细行"
+
+    default_date = datetime.combine(datetime.now().date(), time(hour=17, minute=30))
+    approval_request_id = fields.Many2one('approval.request', string="关联审批单")
+    user_id = fields.Many2one('res.users', string="请假人员")
+    start_time = fields.Datetime(string="开始时间", default=default_date)
+    end_time = fields.Datetime(string="结束时间")
+    overtime_hours = fields.Float(string="加班时长")
+    type_overtime = fields.Selection([('work', '工作日',), ('rest', '休息日',), ('holiday', '节假日')],
+                                     string="加班类型", default="work")
+    compensation_mode = fields.Selection([('salary', '薪资',), ('rest', '调休',)], string="补偿方式", default="salary")
+    is_male_pay = fields.Boolean(string="加班餐费")
+    user_attendance = fields.Char(string="考勤信息")