diff --git a/Runtime/Component/Legend/LegendHandler.cs b/Runtime/Component/Legend/LegendHandler.cs
index 21f0e81f..fd29a163 100644
--- a/Runtime/Component/Legend/LegendHandler.cs
+++ b/Runtime/Component/Legend/LegendHandler.cs
@@ -99,7 +99,7 @@ namespace XCharts.Runtime
                     ChartHelper.AddEventListener(item.button.gameObject, EventTriggerType.PointerDown, (data) =>
                     {
                         if (data.selectedObject == null || legend.selectedMode == Legend.SelectedMode.None) return;
-                        var temp = data.selectedObject.name.Split('_');
+                        var temp = data.selectedObject.name.Split('_', 2);
                         string selectedName = temp[1];
                         int clickedIndex = int.Parse(temp[0]);
                         if (legend.selectedMode == Legend.SelectedMode.Multiple)
@@ -117,7 +117,7 @@ namespace XCharts.Runtime
                             {
                                 for (int n = 0; n < btnList.Length; n++)
                                 {
-                                    temp = btnList[n].name.Split('_');
+                                    temp = btnList[n].name.Split('_', 2);
                                     selectedName = btnList[n].legendName;
                                     var index = btnList[n].index;
                                     OnLegendButtonClick(legend, n, selectedName, index == clickedIndex ? true : false);
@@ -128,7 +128,7 @@ namespace XCharts.Runtime
                     ChartHelper.AddEventListener(item.button.gameObject, EventTriggerType.PointerEnter, (data) =>
                     {
                         if (item.button == null) return;
-                        var temp = item.button.name.Split('_');
+                        var temp = item.button.name.Split('_', 2);
                         string selectedName = temp[1];
                         int index = int.Parse(temp[0]);
                         OnLegendButtonEnter(legend, index, selectedName);
@@ -136,7 +136,7 @@ namespace XCharts.Runtime
                     ChartHelper.AddEventListener(item.button.gameObject, EventTriggerType.PointerExit, (data) =>
                     {
                         if (item.button == null) return;
-                        var temp = item.button.name.Split('_');
+                        var temp = item.button.name.Split('_', 2);
                         string selectedName = temp[1];
                         int index = int.Parse(temp[0]);
                         OnLegendButtonExit(legend, index, selectedName);
@@ -268,4 +268,4 @@ namespace XCharts.Runtime
             }
         }
     }
-}
\ No newline at end of file
+}