diff --git a/src/chart/helper/createClipPathFromCoordSys.ts b/src/chart/helper/createClipPathFromCoordSys.ts
index 7bc83d7def..74ec7f8e90 100644
--- a/src/chart/helper/createClipPathFromCoordSys.ts
+++ b/src/chart/helper/createClipPathFromCoordSys.ts
@@ -51,8 +51,12 @@ function createGridClipPath(
     height += lineWidth;
 
     // fix: https://github.com/apache/incubator-echarts/issues/11369
-    x = Math.floor(x);
-    width = Math.round(width);
+    width = Math.ceil(width);
+    if (x !== Math.floor(x)) {
+        x = Math.floor(x);
+        // if no extra 1px on `width`, it will still be clipped since `x` is floored
+        width++;
+    }
 
     const clipPath = new graphic.Rect({
         shape: {
@@ -165,4 +169,4 @@ export {
     createGridClipPath,
     createPolarClipPath,
     createClipPath
-};
\ No newline at end of file
+};
diff --git a/test/clip-line-cap.html b/test/clip-line-cap.html
new file mode 100644
index 0000000000..c444e3af5c
--- /dev/null
+++ b/test/clip-line-cap.html
@@ -0,0 +1,93 @@
+<!DOCTYPE html>
+<!--
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License.  You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied.  See the License for the
+specific language governing permissions and limitations
+under the License.
+-->
+
+
+<html>
+    <head>
+        <meta charset="utf-8">
+        <meta name="viewport" content="width=device-width, initial-scale=1" />
+        <script src="lib/simpleRequire.js"></script>
+        <script src="lib/config.js"></script>
+        <script src="lib/jquery.min.js"></script>
+        <script src="lib/facePrint.js"></script>
+        <script src="lib/testHelper.js"></script>
+        <!-- <script src="ut/lib/canteen.js"></script> -->
+        <link rel="stylesheet" href="lib/reset.css" />
+    </head>
+    <body>
+        <style>
+        </style>
+
+
+
+        <div id="main0"></div>
+
+
+
+
+
+
+        <script>
+        require([
+            'echarts',
+        ], function (echarts) {
+            var option;
+
+            option = {
+                grid: {
+                    width: 503,
+                    height: 400,
+                },
+                xAxis: {
+                    type: 'category',
+                    data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'],
+                    boundaryGap: false,
+                },
+                yAxis: {
+                    type: 'value'
+                },
+                series: [
+                    {
+                        data: [150, 230, 224, 218, 135, 147, 152],
+                        type: 'line',
+                        showSymbol: false,
+                        lineStyle: {
+                            width: 4,
+                            cap: 'round',
+                        },
+                    },
+                ],
+            };
+
+            var chart = testHelper.create(echarts, 'main0', {
+                title: [
+                    'Should Not Clip The Rightmost Cap of The Line'
+                ],
+                option: option
+                // height: 300,
+                // buttons: [{text: 'btn-txt', onclick: function () {}}],
+                // recordCanvas: true,
+            });
+        });
+        </script>
+
+
+    </body>
+</html>
