diff --git a/Demo/Scripts/Demo60_Heatmap.cs b/Demo/Scripts/Demo60_Heatmap.cs
new file mode 100644
index 00000000..499dc9ef
--- /dev/null
+++ b/Demo/Scripts/Demo60_Heatmap.cs
@@ -0,0 +1,95 @@
+using System.Collections.Generic;
+using UnityEngine;
+using XCharts;
+
+[DisallowMultipleComponent]
+[ExecuteInEditMode]
+public class Demo60_Heatmap : MonoBehaviour
+{
+    private HeatmapChart chart;
+
+    void Awake()
+    {
+        chart = gameObject.GetComponent<HeatmapChart>();
+        if (chart == null)
+        {
+            chart = gameObject.AddComponent<HeatmapChart>();
+        }
+        chart.title.text = "HeatmapChart";
+        chart.tooltip.type = Tooltip.Type.None;
+        chart.grid.left = 100;
+        chart.grid.right = 60;
+        chart.grid.bottom = 60;
+        //目前只支持Category
+        chart.xAxises[0].type = Axis.AxisType.Category;
+        chart.yAxises[0].type = Axis.AxisType.Category;
+
+        chart.xAxises[0].boundaryGap = true;
+        chart.xAxises[0].boundaryGap = true;
+
+        chart.xAxises[0].splitNumber = 10;
+        chart.yAxises[0].splitNumber = 10;
+
+        //清空数据重新添加
+        chart.RemoveData();
+        var serie = chart.AddSerie(SerieType.Heatmap, "serie1");
+        
+        //设置样式
+        serie.itemStyle.show = true;
+        serie.itemStyle.borderWidth = 1;
+        serie.itemStyle.borderColor = Color.clear;
+
+        //设置高亮样式
+        serie.emphasis.show = true;
+        serie.emphasis.itemStyle.show = true;
+        serie.emphasis.itemStyle.borderWidth = 1;
+        serie.emphasis.itemStyle.borderColor = Color.black;
+
+        //设置视觉映射组件
+        chart.visualMap.enable = true;
+        chart.visualMap.max = 10;
+        chart.visualMap.range[0] = 0f;
+        chart.visualMap.range[1] = 10f;
+        chart.visualMap.orient = Orient.Vertical;
+        chart.visualMap.calculable = true;
+        chart.visualMap.location.align = Location.Align.BottomLeft;
+        chart.visualMap.location.bottom = 100;
+        chart.visualMap.location.left = 30;
+        
+        //清空颜色重新添加
+        chart.visualMap.inRange.Clear();
+
+        var heatmapGridWid = 10f;
+        int xSplitNumber = (int)(chart.coordinateWid / heatmapGridWid);
+        int ySplitNumber = (int)(chart.coordinateHig / heatmapGridWid);
+        var colors = new List<string>{"#313695", "#4575b4", "#74add1", "#abd9e9", "#e0f3f8", "#ffffbf",
+                "#fee090", "#fdae61", "#f46d43", "#d73027", "#a50026"};
+        foreach (var str in colors)
+        {
+            chart.visualMap.inRange.Add(ThemeInfo.GetColor(str));
+        }
+        //添加xAxis的数据
+        for (int i = 0; i < xSplitNumber; i++)
+        {
+            chart.AddXAxisData((i + 1).ToString());
+        }
+        //添加yAxis的数据
+        for (int i = 0; i < ySplitNumber; i++)
+        {
+            chart.AddYAxisData((i + 1).ToString());
+        }
+        for (int i = 0; i < xSplitNumber; i++)
+        {
+            for (int j = 0; j < ySplitNumber; j++)
+            {
+                var value = 0f;
+                var rate = Random.Range(0, 101);
+                if (rate > 70) value = Random.Range(8f, 10f);
+                else value = Random.Range(1f, 8f);
+                var list = new List<float> { i, j, value };
+                //至少是一个三位数据：（x,y,value）
+                chart.AddData(0, list);
+            }
+        }
+    }
+}
diff --git a/Demo/Scripts/Demo60_Heatmap.cs.meta b/Demo/Scripts/Demo60_Heatmap.cs.meta
new file mode 100644
index 00000000..4112a381
--- /dev/null
+++ b/Demo/Scripts/Demo60_Heatmap.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 616b96a944de949af9aa66767a2fbff7
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Scripts/UI/Component/VisualMap.cs b/Scripts/UI/Component/VisualMap.cs
index 041223f1..5d16f7ff 100644
--- a/Scripts/UI/Component/VisualMap.cs
+++ b/Scripts/UI/Component/VisualMap.cs
@@ -358,7 +358,7 @@ namespace XCharts
             {
                 var radius = triangleLen / 2;
                 var pos1 = centerPos + Vector3.left * itemHeight / 2;
-                var cpos = new Vector3(pos1.x + rangeMinHeight - radius, pos1.y + itemWidth / 2 + radius);
+                var cpos = new Vector3(pos1.x + rangeMinHeight, pos1.y + itemWidth / 2 + radius);
                 return local.x >= cpos.x - radius && local.x <= cpos.x + radius &&
                 local.y >= cpos.y - radius && local.y <= cpos.y + radius;
             }