In recent years, with the rapid development of economy and science and technology, wind power generator emerged as a new energy infrastructure, which not only effectively solved the problem of energy shortage in China, but also effectively controlled the situation of environmental pollution. As a super-large bearing, the rotor bearing of wind turbine is not only complicated to be loaded, but also difficult to disassemble and maintain. Therefore, the design and manufacture of the rotor bearing of wind turbine has always been one of the focuses of attention