Abstract: In order to make on-line monitoring and earlier fault diagnosis of motor of shearer effectively, a protection and control module of motor of shearer based on TMS320F2812 was designed, and designs of hardware circuit and software of the module were introduced in details. The protection and control module can monitor running state of motor of shearer real-timely to achieve protection function of overheating, overload, short circuit and phase failure of motor of shearer. At the same time, the module can analyze harmonic of running current of motor of shearer to achieve self-diagnosis function of stator and rotor. The testing result in mine showed that the module has high reliability and good real-time.