用 <script type="text/wxtag-template"> 代替 <template> 标签，我试了下可以 <wx-open-launch-weapp id="launch-btn" username="gh_1770c4973780" path="/pages/index/index.html" > <script type="text/wxtag-template"> <style>.btn{}</style> <button className="btn" style={{ padding: '20px', border: '2px solid #ccc' }}>打开小程序</button> </script> </wx-open-launch-weapp>