Postgraduate entrance examination for mechanical major is to master the basic knowledge, basic principles and relatively skilled professional practical skills necessary for this major, as well as the knowledge and ability that students need when they graduate. Mechanical specialty mainly includes mechanical design, manufacturing and automation, material forming and control engineering, industrial design, process equipment and control engineering. Many colleagues misunderstand the employment prospects of this kind of mechanical specialty, and think that the counterpart work of this kind of mechanical specialty does not look "decent". In fact, they all ignore the extensive adaptability of mechanical specialty, such as its application in equipment maintenance, numerical control maintenance, environmental protection equipment design and other fields.