Equipment protection device of hybrid electric vehicle

The utility model provides an equipment protection device of a hybrid electric vehicle. The equipment protection device of the hybrid electric vehicle comprises a vehicle controller, an auxiliary control unit and at least one peripheral unit. Each peripheral unit is provided with a low-voltage return circuit which supplies power to the peripheral unit. The protection device further comprises a main relay electrically connected with the vehicle controller. The vehicle controller is used for controlling power-on or power-off of the main relay, when the main relay is powered on, the low-voltage return circuit normally works, and when the main relay is powered off, the low-voltage return circuit stops working; the vehicle controller is further used for communicating with the auxiliary control unit on the vehicle, when breakdown signals sent by the auxiliary control unit are received, and the main relay is in a power-off state, the main relay is controlled to be powered off. The equipment protection device of the hybrid electric vehicle can effectively protect the peripheral units of the vehicle controller in the electrifying initialization process or when the auxiliary control unit breaks down, and prolong service life of the equipment.