Expansion: the process of "cloud" defense is the same as that of on-site defense, and it is carried out according to the following links: the respondent expounds the paper, the defense group teacher asks questions, the respondent answers questions, and the defense teacher scores. The process of defense is rigorous and orderly, and the quality of defense has not been reduced because of the change of defense form. The process of defense ensures the rigor and sense of ceremony, and students appreciate the way and effect of this defense. Teachers have said that this form of defense provides more choices for students' future academic guidance. The virus is ruthless, and some students can't attend the online defense on time due to some force majeure factors. According to the special situation of students, the defense team will start the emergency plan in time and adjust the defense schedule in time to ensure that each student can successfully complete the graduation thesis defense.