diff --git a/lib/hexo/default_config.ts b/lib/hexo/default_config.ts
index 390b8f32f5..e9331ececa 100644
--- a/lib/hexo/default_config.ts
+++ b/lib/hexo/default_config.ts
@@ -36,6 +36,7 @@ export = {
   filename_case: 0,
   render_drafts: false,
   post_asset_folder: false,
+  post_extensions: [],
   relative_link: false,
   future: true,
   syntax_highlighter: 'highlight.js',
diff --git a/lib/plugins/processor/post.ts b/lib/plugins/processor/post.ts
index 856fff5ba2..83880ee39a 100644
--- a/lib/plugins/processor/post.ts
+++ b/lib/plugins/processor/post.ts
@@ -48,9 +48,13 @@ export = (ctx: Hexo) => {
       // checks only if there is a renderer for the file type or if is included in skip_render
       result.renderable = ctx.render.isRenderable(path) && !isMatch(path, ctx.config.skip_render);
 
-      // if post_asset_folder is set, restrict renderable files to default file extension
+      // if post_asset_folder is set, restrict renderable files to post_extensions or the default file extension
       if (result.renderable && ctx.config.post_asset_folder) {
-        result.renderable = (extname(ctx.config.new_post_name) === extname(path));
+        if (!Array.isArray(ctx.config.post_extensions) || ctx.config.post_extensions.length === 0) {
+          result.renderable = (extname(ctx.config.new_post_name) === extname(path));
+        } else {
+          result.renderable = ctx.config.post_extensions.includes(extname(path).slice(1));
+        }
       }
 
       return result;
diff --git a/test/scripts/processors/post.ts b/test/scripts/processors/post.ts
index e3f1ff54c0..8b95806a50 100644
--- a/test/scripts/processors/post.ts
+++ b/test/scripts/processors/post.ts
@@ -1359,4 +1359,42 @@ describe('post', () => {
       PostAsset.removeById(id)
     ]);
   });
+
+  it('post - post_extensions', async () => {
+    function fooRenderer() {
+      return '';
+    }
+
+    hexo.extend.renderer.register('md', 'html', fooRenderer, true);
+    hexo.extend.renderer.register('adoc', 'html', fooRenderer, true);
+    hexo.extend.renderer.register('ejs', 'html', fooRenderer, true);
+
+    hexo.config.post_asset_folder = true;
+    hexo.config.new_post_name = ':title.md';
+
+    hexo.config.post_extensions = null;
+    pattern.match('_posts/foo.md').should.have.property('renderable', true);
+    pattern.match('_posts/foo.adoc').should.have.property('renderable', false);
+    pattern.match('_posts/foo.ejs').should.have.property('renderable', false);
+
+    hexo.config.post_extensions = [];
+    pattern.match('_posts/foo.md').should.have.property('renderable', true);
+    pattern.match('_posts/foo.adoc').should.have.property('renderable', false);
+    pattern.match('_posts/foo.ejs').should.have.property('renderable', false);
+
+    hexo.config.post_extensions = ['adoc'];
+    pattern.match('_posts/foo.md').should.have.property('renderable', false);
+    pattern.match('_posts/foo.adoc').should.have.property('renderable', true);
+    pattern.match('_posts/foo.ejs').should.have.property('renderable', false);
+
+    hexo.config.post_extensions = ['md', 'adoc'];
+    pattern.match('_posts/foo.md').should.have.property('renderable', true);
+    pattern.match('_posts/foo.adoc').should.have.property('renderable', true);
+    pattern.match('_posts/foo.ejs').should.have.property('renderable', false);
+
+    hexo.config.post_extensions = ['md', 'adoc', 'ejs'];
+    pattern.match('_posts/foo.md').should.have.property('renderable', true);
+    pattern.match('_posts/foo.adoc').should.have.property('renderable', true);
+    pattern.match('_posts/foo.ejs').should.have.property('renderable', true);
+  });
 });