Static current control method

The invention discloses a quiescent current control method. The method comprises the following steps: switching the state of a BSWM state machine corresponding to a basic software mode management BSWM module from an operation state to a subsequent operation management state according to a sleep instruction; in the subsequent operation management state, if the BSWM state machine does not acquire a first instruction, switching the state of the BSWM state machine to a pre-power-down state; and in the pre-power-down state, if the BSWM state machine does not obtain a second instruction, switching the state of the BSWM state machine to a power-down state, and in response to the power-down state, managing an ECU M state machine corresponding to an ECU M module through an electronic control unit to perform subsequent power-down operation. According to the technical scheme, the power-off operation is completed through the steps, so that the quiescent current is well reduced, the power consumption of the vehicle body c