diff --git a/CHANGELOG-EN.md b/CHANGELOG-EN.md
index f942ddab..3bdce0bf 100644
--- a/CHANGELOG-EN.md
+++ b/CHANGELOG-EN.md
@@ -43,6 +43,8 @@
 
 ## branch-2.0
 
+* (2022.03.24) Fixed `Axis` precision issue #184
+
 ## v2.7.0
 
 * (2022.03.20) Release `v2.7.0` version
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0235167c..3c50f4c7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -43,6 +43,8 @@
 
 ## branch-2.0
 
+* (2022.03.24) 修复`Axis`的精度问题 #184
+
 ## v2.7.0
 
 * (2022.03.20) 发布`v2.7.0`版本
diff --git a/Runtime/Component/Main/Axis.cs b/Runtime/Component/Main/Axis.cs
index 5cb5ed7e..1e38ac58 100644
--- a/Runtime/Component/Main/Axis.cs
+++ b/Runtime/Component/Main/Axis.cs
@@ -88,10 +88,10 @@ namespace XCharts
         [SerializeField] protected int m_PolarIndex;
         [SerializeField] protected AxisPosition m_Position;
         [SerializeField] protected float m_Offset;
-        [SerializeField] protected float m_Min;
-        [SerializeField] protected float m_Max;
+        [SerializeField] protected double m_Min;
+        [SerializeField] protected double m_Max;
         [SerializeField] protected int m_SplitNumber = 5;
-        [SerializeField] protected float m_Interval = 0;
+        [SerializeField] protected double m_Interval = 0;
         [SerializeField] protected bool m_BoundaryGap = true;
         [SerializeField] protected int m_MaxCache = 0;
         [SerializeField] protected float m_LogBase = 10;
@@ -180,7 +180,7 @@ namespace XCharts
         /// The minimun value of axis.Valid when `minMaxType` is `Custom`
         /// 设定的坐标轴刻度最小值，当minMaxType为Custom时有效。
         /// </summary>
-        public float min
+        public double min
         {
             get { return m_Min; }
             set { if (PropertyUtil.SetStruct(ref m_Min, value)) SetAllDirty(); }
@@ -189,7 +189,7 @@ namespace XCharts
         /// The maximum value of axis.Valid when `minMaxType` is `Custom`
         /// 设定的坐标轴刻度最大值，当minMaxType为Custom时有效。
         /// </summary>
-        public float max
+        public double max
         {
             get { return m_Max; }
             set { if (PropertyUtil.SetStruct(ref m_Max, value)) SetAllDirty(); }
@@ -207,7 +207,7 @@ namespace XCharts
         /// Compulsively set segmentation interval for axis.This is unavailable for category axis.
         /// 强制设置坐标轴分割间隔。无法在类目轴中使用。
         /// </summary>
-        public float interval
+        public double interval
         {
             get { return m_Interval; }
             set { if (PropertyUtil.SetStruct(ref m_Interval, value)) SetAllDirty(); }