diff --git a/core/function-impl/mogo-core-function-map/src/main/java/com/mogo/eagle/core/function/smp/MarkerDrawerManager.kt b/core/function-impl/mogo-core-function-map/src/main/java/com/mogo/eagle/core/function/smp/MarkerDrawerManager.kt
index fde74be4da..ac07806e88 100644
--- a/core/function-impl/mogo-core-function-map/src/main/java/com/mogo/eagle/core/function/smp/MarkerDrawerManager.kt
+++ b/core/function-impl/mogo-core-function-map/src/main/java/com/mogo/eagle/core/function/smp/MarkerDrawerManager.kt
@@ -121,6 +121,7 @@ object MarkerDrawerManager {
      * @param realLat
      * @return 返回已经到达点的index
      */
+    @Synchronized
     private fun getCarLocationIndex(
         routePoints: List<LatLng>,
         newPoints: MutableList<LatLng>,