Vehicle-mounted controller power-on and power-off sequential control method and vehicle-mounted controller

The invention discloses a power-on and power-off time sequence control method for a vehicle-mounted controller, and the method comprises the steps: obtaining the reset information of a main chip in a power-on state before starting, and entering a power-on state after starting; in a power-on state after starting, acquiring NVM reset information and wake-up source information, and entering a pre-operation state; in the pre-operation state, entering a full-function state or a pre-dormant state according to the main chip reset information, the NVM reset information and the wake-up source information; in the full-function state, entering a pre-dormant state or keeping the full-function state according to the wake-up information; in the pre-dormant state, entering a power-off state before closing; in the power-off state before closing, returning to the pre-operation state or entering the power-off state after closing according to the new wake-up source; and in the power-off state after closing, returning to the pow