Electrification/power-off control method of control system of hybrid vehicle and control device

The invention provides an electrification/power-off control method of a hybrid power control device of a hybrid vehicle; an electrification method comprises the steps of performing self-checking, closing a main relay, building oil pressure for an oil pump, setting a working mode for a DC/CD converter and a motor, checking a state of an electric driving gearbox and confirming a hydraulic state; and a power-off method comprises the steps of receiving a power supply shutoff command, sending a shutoff preparation instruction, performing three-phase alternating-current insulation detection and feedback of signals, opening a main relay and performing a high-voltage power-off process. The invention further provides an electrification/power-off control device of the hybrid power control system of the hybrid vehicle; and the device comprises a whole vehicle control unit controller, an oil pump, a battery management system, an integrated starter generator all-in-one machine microcontrol unit (ISGMCU), the DC/CD converter and an ACP.