diff --git a/sf_manufacturing/models/mrp_workorder.py b/sf_manufacturing/models/mrp_workorder.py
index ea76896a..2c3510bd 100644
--- a/sf_manufacturing/models/mrp_workorder.py
+++ b/sf_manufacturing/models/mrp_workorder.py
@@ -1069,7 +1069,7 @@ class CNCprocessing(models.Model):
     _order = 'sequence_number,id'
 
     cnc_id = fields.Many2one('ir.attachment')
-    sequence_number = fields.Char('序号')
+    sequence_number = fields.Integer('序号')
     program_name = fields.Char('程序名')
     functional_tool_type_id = fields.Many2one('sf.functional.cutting.tool.model', string='功能刀具类型')
     cutting_tool_name = fields.Char('刀具名称')