diff --git a/CHANGELOG.md b/CHANGELOG.md
index 15f48089..bc116733 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -57,6 +57,7 @@
 
 ## master
 
+* (2022.08.09) 优化`Axis`的`Time`时间轴的次分割线
 * (2022.08.09) 增加`AreaStyle`的`innerFill`参数支持填充凸多边形
 * (2022.08.08) 优化`Serie`的数据项索引维护，增加检测和修复功能，修复相关问题
 * (2022.07.29) 修复`Unity`版本兼容：在某些版本导入后图表创建异常的问题
diff --git a/Runtime/Component/Axis/AxisHandler.cs b/Runtime/Component/Axis/AxisHandler.cs
index 50e9b3ac..0a86e596 100644
--- a/Runtime/Component/Axis/AxisHandler.cs
+++ b/Runtime/Component/Axis/AxisHandler.cs
@@ -562,6 +562,12 @@ namespace XCharts
             if (AxisHelper.NeedShowSplit(axis))
             {
                 var size = AxisHelper.GetScaleNumber(axis, axisLength, dataZoom);
+                if (axis.IsTime())
+                {
+                    size += 1;
+                    if (!ChartHelper.IsEquals(axis.GetLastLabelValue(), axis.context.maxValue))
+                        size += 1;
+                }
                 var tickWidth = axis.axisTick.GetWidth(theme.tickWidth);
                 var tickColor = axis.axisTick.GetColor(theme.tickColor);
                 var current = orient == Orient.Horizonal ? startX : startY;
diff --git a/Runtime/Utilities/DateTimeUtil.cs b/Runtime/Utilities/DateTimeUtil.cs
index cf97f145..1ff3fa97 100644
--- a/Runtime/Utilities/DateTimeUtil.cs
+++ b/Runtime/Utilities/DateTimeUtil.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using UnityEngine;
 
 namespace XCharts.Runtime
 {
@@ -160,7 +161,7 @@ namespace XCharts.Runtime
 
         private static void AddTickTimestamp(List<double> list, int startTimestamp, int maxTimestamp, int tickSecond)
         {
-            while (startTimestamp < maxTimestamp)
+            while (startTimestamp <= maxTimestamp)
             {
                 list.Add(startTimestamp);
                 startTimestamp += tickSecond;