Graduation thesis defense is an important form of organized, prepared, planned and evaluated papers. In order to do a good job in the defense of graduation thesis, the school, the defense Committee and the respondent (the author who wrote the graduation thesis) should make full preparations before the defense meeting. At the defense meeting, the examiner should try his best to find out whether the level shown in the paper is true or not. Students should not only prove that their arguments are correct, but also answer the teacher's questions.