diff --git a/src/Add-on/DrawBoard/ActivityLayerBoardTool.ts b/src/Add-on/DrawBoard/ActivityLayerBoardTool.ts
index b9258763e..6240256e7 100644
--- a/src/Add-on/DrawBoard/ActivityLayerBoardTool.ts
+++ b/src/Add-on/DrawBoard/ActivityLayerBoardTool.ts
@@ -229,6 +229,9 @@ class ActivityLayerBoardTool
 
                     let otherBoard = GetEntity(intersection.object) as Board;
 
+                    if (isParallelTo(otherBoard.Normal, br.Normal))//层板和层板组成层板钉没有意义 #I7CB67
+                        continue;
+
                     this.IntersectFace(otherBoard, face);
 
                     let nail = CylinderHole.CreateCylHole(nailOption.rad, nailOption.length, GangDrillType.Nail);