已经解决了 html页面里把验证码后的hidden部分全部注释掉就好
<!--
<img src="/captcha/image/2f3f82e5f7a054bf5caa93b9b0bb6cc308fb7011/" alt="captcha" class="captcha" />
<input id="id_captcha_0" name="captcha_0" type="hidden" value="2f3f82e5f7a054bf5caa93b9b0bb6cc308fb7011" />
<input autocomplete="off" id="id_captcha_1" name="captcha_1" type="text" />-->