diff --git a/Documentation~/zh/changelog.md b/Documentation~/zh/changelog.md
index 7963a82e..ef1b27bb 100644
--- a/Documentation~/zh/changelog.md
+++ b/Documentation~/zh/changelog.md
@@ -65,6 +65,7 @@ slug: /changelog
 
 ## master
 
+* (2022.12.29) 修复`UpdateXYData()`接口影响数据精度的问题 (#238)
 * (2022.12.28) 修复`Pie`只有一个数据时设置`border`后显示异常的问题 (#237)
 * (2022.12.22) 调整`Covert`重命名为`Convert`，涉及的接口有：`ConvertXYAxis()`，`CovertSerie()`等
 * (2022.12.22) 修复`Convert XY Axis`后Y轴的`Label`显示异常的问题
diff --git a/Runtime/Serie/Serie.cs b/Runtime/Serie/Serie.cs
index 5cabe856..e0d1696e 100644
--- a/Runtime/Serie/Serie.cs
+++ b/Runtime/Serie/Serie.cs
@@ -1658,7 +1658,7 @@ namespace XCharts.Runtime
         /// <param name="index"></param>
         /// <param name="xValue"></param>
         /// <param name="yValue"></param>
-        public bool UpdateXYData(int index, float xValue, float yValue)
+        public bool UpdateXYData(int index, double xValue, double yValue)
         {
             var flag1 = UpdateData(index, 0, xValue);
             var flag2 = UpdateData(index, 1, yValue);