diff --git a/sf_base/models/tool_other_features.py b/sf_base/models/tool_other_features.py
index 9dd30710..bc8f369e 100644
--- a/sf_base/models/tool_other_features.py
+++ b/sf_base/models/tool_other_features.py
@@ -38,7 +38,7 @@ class ToolMaterialsBasicParameters(models.Model):
     width = fields.Float('宽度(mm)')
     cutting_blade_length = fields.Float('切削刃长(mm)')
     relief_angle = fields.Integer('后角(°)')
-    blade_tip_circular_arc_radius = fields.Char('刀尖圆弧半径(mm)', size=20)
+    blade_tip_circular_arc_radius = fields.Char('刀尖圆弧半径(mm)', size=20,default='0')
     inscribed_circle_diameter = fields.Float('内接圆直径IC/D(mm)')
     install_aperture_diameter = fields.Float('安装孔直径(mm)')
     chip_breaker_groove = fields.Selection([('无', '无'), ('单面', '单面'), ('双面', '双面')],