diff --git a/service/repositories/order.go b/service/repositories/order.go
index faffca77..9d16f295 100644
--- a/service/repositories/order.go
+++ b/service/repositories/order.go
@@ -1770,7 +1770,7 @@ func (d *defaultOrder) OrderDetailHandler(ctx context.Context, orderInfo *gmodel
 			Metadata:       orderMetadata,
 		}
 		// 购物车对应商品
-		var shoppingCartSnapshotDataMap = make(map[int64]gmodel.FsShoppingCartData)
+		var shoppingCartSnapshotDataMap = make(map[int64]gmodel.FsShoppingCartData, len(shoppingCartSnapshot))
 		for _, shoppingCartSnapshotValue := range shoppingCartSnapshot {
 			var shoppingCartSnapshotData gmodel.FsShoppingCartData
 			snapshot, err := d.OrderShoppingCartSnapshotHandler(ctx, shoppingCartSnapshotValue.Snapshot)