Permanent magnet synchronous motor (PMSM) has the advantages of small size, light weight, simple structure, reliable operation, high power factor, easy heat dissipation and easy maintenance. It has become the best choice for electric vehicle air conditioner compressors, but in actual working conditions, the air conditioner compressor has the problem of excessive noise and serious system turbulence, which makes the air conditioner compressor unable to work normally, which has serious consequences. The method of using the field oriented control can overcome the problems existing under actual working conditions, so it proposed the design of permanent magnet synchronous motor control system for electric vehicle air conditioner compressor.