diff --git a/e2e/cases/html/script-loading/index.test.ts b/e2e/cases/html/script-loading/index.test.ts
index 0f1599dc91..02c31d6178 100644
--- a/e2e/cases/html/script-loading/index.test.ts
+++ b/e2e/cases/html/script-loading/index.test.ts
@@ -37,3 +37,58 @@ test('should allow to set scriptLoading to "module"', async ({ build }) => {
 
   expect(html).toContain('<script type="module" src="');
 });
+
+test('should not affect existing script tags in HTML template', async ({
+  build,
+}) => {
+  const rsbuild = await build({
+    config: {
+      output: {
+        filenameHash: false,
+      },
+      html: {
+        template: './src/index.html',
+        scriptLoading: 'module',
+      },
+    },
+  });
+  const files = rsbuild.getDistFiles();
+  const html = getFileContent(files, 'index.html');
+  expect(html).toContain(
+    '<script async src="https://example.com/foo.js"></script>',
+  );
+  expect(html).toContain(
+    '<script type="module" src="/static/js/index.js"></script>',
+  );
+});
+
+test('should not affect tags generated by `html.tags`', async ({ build }) => {
+  const rsbuild = await build({
+    config: {
+      output: {
+        filenameHash: false,
+      },
+      html: {
+        scriptLoading: 'module',
+        tags: [
+          {
+            tag: 'script',
+            attrs: {
+              src: 'https://example.com/foo.js',
+              async: true,
+            },
+          },
+        ],
+      },
+    },
+  });
+
+  const files = rsbuild.getDistFiles();
+  const html = getFileContent(files, 'index.html');
+  expect(html).toContain(
+    '<script src="https://example.com/foo.js" async></script>',
+  );
+  expect(html).toContain(
+    '<script type="module" src="/static/js/index.js"></script>',
+  );
+});
diff --git a/e2e/cases/html/script-loading/src/index.html b/e2e/cases/html/script-loading/src/index.html
new file mode 100644
index 0000000000..6dbb6b986a
--- /dev/null
+++ b/e2e/cases/html/script-loading/src/index.html
@@ -0,0 +1,7 @@
+<!doctype html>
+<html>
+  <head>
+    <script async src="https://example.com/foo.js"></script>
+  </head>
+  <body></body>
+</html>
diff --git a/website/docs/en/config/html/script-loading.mdx b/website/docs/en/config/html/script-loading.mdx
index d8d3c64132..869b4334ac 100644
--- a/website/docs/en/config/html/script-loading.mdx
+++ b/website/docs/en/config/html/script-loading.mdx
@@ -13,6 +13,16 @@ Specifies how `<script>` tags generated by Rsbuild are loaded.
 If [output.module](/config/output/module) is enabled, the value is always `'module'`.
 :::
 
+## Note
+
+The `scriptLoading` option only applies to `<script>` tags automatically generated by Rsbuild. It does not affect:
+
+- `<script>` tags that already exist in the HTML template
+- `<script>` tags added via [html.tags](/config/html/tags)
+- `<script>` tags added via [api.modifyHtmlTags](/plugins/dev/hooks#modifyhtmltags)
+
+## Optional values
+
 ### defer
 
 By default, the `<script>` tag generated by Rsbuild will automatically set the [`defer` attribute](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements/script#defer) to avoid blocking the parsing and rendering of the page.
diff --git a/website/docs/zh/config/html/script-loading.mdx b/website/docs/zh/config/html/script-loading.mdx
index cdb6cb5b6f..262509b803 100644
--- a/website/docs/zh/config/html/script-loading.mdx
+++ b/website/docs/zh/config/html/script-loading.mdx
@@ -13,6 +13,16 @@
 如果启用了 [output.module](/config/output/module)，该值将始终为 `'module'`。
 :::
 
+## 注意
+
+`scriptLoading` 选项仅作用于 Rsbuild 自动生成的 `<script>` 标签，不会影响：
+
+- HTML 模板中已经存在的 `<script>` 标签
+- 通过 [html.tags](/config/html/tags) 添加的 `<script>` 标签
+- 通过 [api.modifyHtmlTags](/plugins/dev/hooks#modifyhtmltags) 添加的 `<script>` 标签
+
+## 可选值
+
 ### defer
 
 默认情况下，Rsbuild 生成的 `<script>` 标签会自动设置 [`defer` 属性](https://developer.mozilla.org/zh-CN/docs/Web/HTML/Reference/Elements/script#defer)，以避免阻塞页面的解析和渲染。
