diff --git a/server/wheelserver/mt/MapGrid.go b/server/wheelserver/mt/MapGrid.go
index dc6bbbe9..1753a011 100644
--- a/server/wheelserver/mt/MapGrid.go
+++ b/server/wheelserver/mt/MapGrid.go
@@ -19,6 +19,7 @@ type MapGrid struct {
 
 type MapGridTable struct {
 	f5.IdMetaTable[MapGrid]
+	maxGridId int32
 }
 
 func (this *MapGrid) Init1() {
@@ -38,3 +39,12 @@ func (this *MapGrid) Init1() {
 func (this *MapGrid) GetRewardItems() *[]*MapGridRewardItem {
 	return &this.rewardItems
 }
+
+func (this *MapGridTable) PostInit1() {
+	this.Traverse(func (gridMeta *MapGrid) bool {
+		if gridMeta.GetId() > this.maxGridId {
+			this.maxGridId = gridMeta.GetId()
+		}
+		return true
+	})
+}