The invention relates to an IGBT drive fault detection and diagnosis method. An IGBT driver board generates a fault and transmits a fault signal to an driving unit of a control system; the driving unit carries out real-time fault signal monitoring, and when detecting the fault signal transmitted by the IGBT driver board, the driving unit acquires the fault signal output by the IGBT driver board, carries out analysis and logic judgment according to the appearance of the fault signal, and outputs a protection control signal; a communication device of the control system transmits the protection control signal output by the driving unit to other related systems; a prompt device receives the protection control signal output by the communication device and intuitively presents a fault solution; an operator carries out corresponding operation according to the cause of the fault; and after the fault is removed, the control system is repowered on, and the driving unit restarts fault signal monitoring. The time for fault removing is shortened, the running stability of equipment is improved, and good running performance is achieved.