Control method and device of hybrid electric vehicle and hybrid electric vehicle

The invention provides a control method and device of a hybrid electric vehicle and a hybrid electric vehicle. The control method of the hybrid electric vehicle comprises: acquiring a torque request corresponding to vehicle demanded power; if an engine fails to reach torque required in the torque request, operating the torque request and transmitting a torque assist request to a motor controller MCU; controlling a motor to output according to torque required in the torque assist request. The control method of the hybrid electric vehicle according to the invention enables VVT and OCV valves to be omitted for the engine of the hybrid electric vehicle, the motor assists the engine in outputting torque, and output power of the hybrid electric vehicle is increased; by omitting the VVT and OCV valves, the cost is reduced; the engine is simple to arrange, dimensional space of the engine is decreased, and the engine is less difficult to arrange; in addition, the control method of the hybrid electric vehicle can provi