微信BUG，建议你更新到最新版本，再绑定。
微信绑定银行卡具体操作步骤如下：
1、打开微信软件，然后进入到【我】选项，可以看到【我的银行卡】/iknow-pic.cdn.bcebos.com/279759ee3d6d55fb47b776c766224f4a21a4ddda"target="_blank"title="点击查看大图"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.com/279759ee3d6d55fb47b776c766224f4a21a4ddda?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto"esrc="
https://iknow-pic.cdn.bcebos.com/279759ee3d6d55fb47b776c766224f4a21a4ddda"/>
2、进入到【我的银行卡】选项后，点击【添加银行】
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https://iknow-pic.cdn.bcebos.com/7dd98d1001e939011d608ddf70ec54e737d196f4"/>
3、填写支付密码
/iknow-pic.cdn.bcebos.com/b58f8c5494eef01f6f431824ebfe9925bd317dff"target="_blank"title="点击查看大图"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.com/b58f8c5494eef01f6f431824ebfe9925bd317dff?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto"esrc="
https://iknow-pic.cdn.bcebos.com/b58f8c5494eef01f6f431824ebfe9925bd317dff"/>
4、填写银行卡的持卡人姓名和卡号
/iknow-pic.cdn.bcebos.com/203fb80e7bec54e776bb1affb2389b504ec26aff"target="_blank"title="点击查看大图"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.com/203fb80e7bec54e776bb1affb2389b504ec26aff?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto"esrc="
https://iknow-pic.cdn.bcebos.com/203fb80e7bec54e776bb1affb2389b504ec26aff"/>
5、需要再次填写手机号码
/iknow-pic.cdn.bcebos.com/8694a4c27d1ed21b9d5d2e04a66eddc450da3fbe"target="_blank"title="点击查看大图"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.com/8694a4c27d1ed21b9d5d2e04a66eddc450da3fbe?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto"esrc="
https://iknow-pic.cdn.bcebos.com/8694a4c27d1ed21b9d5d2e04a66eddc450da3fbe"/>
6、需要绑定的一行卡需要短信确认，手机会受到一条验证码，这时填写好验证码后就可以点击完成，就绑定好银行卡了。