diff --git a/Documentation~/zh/changelog.md b/Documentation~/zh/changelog.md
index 6e0cadff..af3cfc1a 100644
--- a/Documentation~/zh/changelog.md
+++ b/Documentation~/zh/changelog.md
@@ -81,6 +81,7 @@ slug: /changelog
 
 ## master
 
+* (2026.06.03) 修复`GetMinMaxData`在`showDataDimension`未初始化时返回异常的问题 (#365)
 * (2026.06.03) 增加`Tooltip`通过`TitleLabelStyle`的`TextStyle`的`Alignment`设置标题的对齐方式 (#363)
 * (2026.05.25) 增加`DataZoom`的`filterAxisRange`设置坐标轴的范围计算是否受`DataZoom`的影响
 * (2026.05.23) 优化`DataZoom`的`Marquee`框选功能
diff --git a/Runtime/Serie/SerieHelper.cs b/Runtime/Serie/SerieHelper.cs
index e24e137d..cf8c078c 100644
--- a/Runtime/Serie/SerieHelper.cs
+++ b/Runtime/Serie/SerieHelper.cs
@@ -171,9 +171,9 @@ namespace XCharts.Runtime
                 {
                     var count = 0;
                     if (dimension > 0) count = dimension;
-                    else count = serie.showDataDimension > serieData.data.Count ?
-                        serieData.data.Count :
-                        serie.showDataDimension;
+                    else count = serie.showDataDimension > 0 && serie.showDataDimension < serieData.data.Count ?
+                        serie.showDataDimension :
+                        serieData.data.Count;
                     for (int j = 0; j < count; j++)
                     {
                         var value = serieData.data[j];