diff --git a/CHANGELOG.md b/CHANGELOG.md
index 02cf9f85..b2282e0b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -54,6 +54,7 @@
 
 ## master
 
+* (2022.06.25) 优化`Line`的平滑曲线表现 (#169)
 * (2022.06.25) 修复`DataZoom`开启时`Tooltip`显示数据不一致的问题 (#203)
 * (2022.06.25) 修复`Toolip`在类目轴无数据时绘制异常的问题 (#204)
 * (2022.06.25) 优化`Serie`设置`PlaceHolder`时的`Tooltip`表现
diff --git a/Runtime/Component/Settings/Settings.cs b/Runtime/Component/Settings/Settings.cs
index 1ae8d719..5a7fb4c1 100644
--- a/Runtime/Component/Settings/Settings.cs
+++ b/Runtime/Component/Settings/Settings.cs
@@ -17,7 +17,7 @@ namespace XCharts.Runtime
         [SerializeField] protected Material m_SeriePainterMaterial;
         [SerializeField] protected Material m_UpperPainterMaterial;
         [SerializeField] protected Material m_TopPainterMaterial;
-        [SerializeField][Range(1, 10)] protected float m_LineSmoothStyle = 3f;
+        [SerializeField][Range(1, 10)] protected float m_LineSmoothStyle = 2.5f;
         [SerializeField][Range(1f, 20)] protected float m_LineSmoothness = 2f;
         [SerializeField][Range(0.5f, 20)] protected float m_LineSegmentDistance = 3f;
         [SerializeField][Range(1, 10)] protected float m_CicleSmoothness = 2f;
diff --git a/Runtime/Serie/Line/LineHelper.cs b/Runtime/Serie/Line/LineHelper.cs
index 27d06aeb..b1a2fb1f 100644
--- a/Runtime/Serie/Line/LineHelper.cs
+++ b/Runtime/Serie/Line/LineHelper.cs
@@ -496,7 +496,7 @@ namespace XCharts.Runtime
                 if (isY)
                     UGLHelper.GetBezierListVertical(ref s_CurvesPosList, sp, ep, smoothness, setting.lineSmoothStyle);
                 else
-                    UGLHelper.GetBezierList(ref s_CurvesPosList, sp, ep, lsp, nep, smoothness, setting.lineSmoothStyle);
+                    UGLHelper.GetBezierList(ref s_CurvesPosList, sp, ep, lsp, nep, smoothness, setting.lineSmoothStyle, true);
 
                 for (int j = 1; j < s_CurvesPosList.Count; j++)
                 {
diff --git a/Runtime/XUGL/UGLHelper.cs b/Runtime/XUGL/UGLHelper.cs
index 9d17934f..2f7166cb 100644
--- a/Runtime/XUGL/UGLHelper.cs
+++ b/Runtime/XUGL/UGLHelper.cs
@@ -59,8 +59,7 @@ namespace XUGL
 
             for (int i = 0; i < list1.Count; i++)
             {
-                if (list1[i] == null && list2[i] == null)
-                { }
+                if (list1[i] == null && list2[i] == null) { }
                 else
                 {
                     if (list1[i] != null)
@@ -109,7 +108,7 @@ namespace XUGL
         }
 
         public static void GetBezierList(ref List<Vector3> posList, Vector3 sp, Vector3 ep,
-            Vector3 lsp, Vector3 nep, float smoothness = 2f, float k = 2.0f)
+            Vector3 lsp, Vector3 nep, float smoothness = 2f, float k = 2.0f, bool limit = false)
         {
             float dist = Mathf.Abs(sp.x - ep.x);
             Vector3 cp1, cp2;
@@ -124,9 +123,20 @@ namespace XUGL
             else
             {
                 cp1 = sp + (ep - lsp).normalized * diff;
+                if (limit)
+                    cp1.y = sp.y;
+
+            }
+            if (nep == ep)
+            {
+                cp2 = ep;
+            }
+            else
+            {
+                cp2 = ep - (nep - sp).normalized * diff;
+                if (limit)
+                    cp2.y = ep.y;
             }
-            if (nep == ep) cp2 = ep;
-            else cp2 = ep - (nep - sp).normalized * diff;
             dist = Vector3.Distance(sp, ep);
             int segment = (int) (dist / (smoothness <= 0 ? 2f : smoothness));
             if (segment < 1) segment = (int) (dist / 0.5f);