Abstract: As one of the most important links of the whole power system, induction motor plays an irreplaceable role. Because the operation condition is very complicated, there will be various types of failure in the use of induction motor. In order to ensure the normal operation of the motor, it is very important to diagnose and monitor the early failure of the motor. Considering the needs of future research, the most common bearing fault, stator fault and rotor fault of induction motor are studied. Firstly, the advantages and limitations of each fault diagnosis method are summarized. Secondly, based on the most commonly used vibration signal, motor current signal, acoustic signal and other feature analysis techniques, the current mainstream method of motor fault feature extraction is emphatically discussed. The common fault diagnosis methods and their improvement strategies are summarized, the research status at home and abroad is comprehensively discussed and analyzed, the application scenarios of various fault diagnosis methods are summarized, and the future research direction in this field is prospected, in order to provide the basis and ideas for future researchers.