My advisor completely ignores me what should I do? My advisor became an assistant professor nearly two years ago. I worked with him for one year but did not publish a paper, and he thinks my progress is too slow. He asked if I want him to assign a new PhD student on this project. After that, he completely ignored me and stopped funding me. I also find our research interests are not a good match. The project he gave me requires something new to him and me, and I think that’s a hard problem which needs more time. 

What should I do? I want to change advisor and don’t want him hate me. Should I go to his office directly to talk with him, because he did not reply me after I send him several emails. I am just afraid the bad relationship will influence my reputation in department.
If your advisor has stopped funding you, it has already affected your position in the department.

You should consult with the graduate chair of your department and see what your options are. I’d like to say that there are solutions, but this is unfortunately very much a function of who has funding and is doing a project in an area you’re interested in pursuing. You may need to apply elsewhere, if you can’t find a solution at your school.