git remote -v

origin  https://github.com/userName/xx.git (fetch)

origin  https://github.com/userName/xx.git (push)

原因是使用了https/http的方式来push

1.移除原来的remote

git remote remove origin

2.创建新的remote

git remote add origin  git@github.com:userName/xx.git

3.再输入git remote -v ,发现remote改变了

git remote -v

origin  git@github.com:userName/xx.git (fetch)

origin  git@github.com:userName/xx.git (push)