It is difficult to take the postgraduate entrance examination for intelligent manufacturing engineering in Tongji University. According to relevant information, the discipline foundation of intelligent manufacturing engineering specialty involves many fields and requires solid knowledge of machinery, electronics and computers. The comprehensive quality and ability of students are very demanding. Because this major has attracted the attention of many students, there are a large number of postgraduate students and the competition is fierce, so it is relatively difficult to enroll. First of all, the postgraduate entrance examination (referred to as "postgraduate entrance examination") is difficult, and it is necessary to comprehensively review the knowledge points of various subjects.