diff --git a/src/DatabaseServices/Entity/Extrude.ts b/src/DatabaseServices/Entity/Extrude.ts
index d5cb31003..c479b9fe0 100644
--- a/src/DatabaseServices/Entity/Extrude.ts
+++ b/src/DatabaseServices/Entity/Extrude.ts
@@ -1956,6 +1956,10 @@ export class ExtrudeSolid extends Entity
         let knifs: ExtrudeSolid[] = [];
         this.GetRelevanceKnifes(knifs);
 
+        //如果是切割圆弧板或刀是圆弧板,先不切割
+        if (this instanceof Board && this.IsArcBoard) knifs = [];
+        knifs = knifs.filter(e => !(e instanceof Board && e.IsArcBoard));
+
         if (knifs.length > 0)
         {
             for (let k of knifs)         //复合实体(五金)的子实体没有id