70% to 90%. The passing rate of postgraduate defense is 70%~90%. In fact, the difficulty of graduate thesis lies in blind evaluation, and the passing rate of papers that pass blind evaluation is very high, because most of the defense members are acquaintances of your teacher. As long as your defense is normal and there are no major mistakes, you will pass the defense, which will not be too difficult for you. Defense is an educational term. That is, teachers of several related majors ask some questions according to students' design entities and papers, and at the same time listen to students' personal explanations.