HCU and clutch work mode switching control method

The invention provides an HCU and clutch work mode switching control method. The method comprises the steps of when a clutch is in the non-parallel work mode, determining whether the work conditions of an engine and a drive motor meet a first preset condition; when the work conditions of the engine and the drive motor meet a first preset condition, determining that a power source cannot meet the torque needed by a driver in the previous condition, if the clutch is in the parallel work condition, determining whether the power source can be made to provide a bigger drive torque, or determining whether the power source efficiency and the automobile noise and vibration conditions meet a second preset condition; when it is determined that the clutch is in the parallel work mode, the power source can provide a bigger drive torque, or the power source efficiency and the noise and vibration conditions meet the second condition, switching the clutch to the parallel work mode. The use of the technical scheme can make sure that the automobile has full power, enhances the driving safety, avoid the occurrence of resonance, and reduces noise.