Mechanical key unlocking and locking control method, system and device and vehicle thereof

The invention discloses a mechanical key unlocking and locking control method, a mechanical key unlocking and locking control system device and a vehicle. The method comprises the following steps: detecting whether the vehicle meets the conditions of unlocking and locking by adopting a mechanical key or not; when the condition that the mechanical key needs to be adopted is met, the vehicle door controller detects an unlocking signal or a locking signal of the mechanical key; after the vehicle door controller carries out latching delay on the unlocking signal or the locking signal, the main driving door lock sends the unlocking signal or the locking signal to the vehicle door controller; the vehicle door controller identifies the mechanical key and sends an instruction to the vehicle body controller. The mechanical key can be adopted for unlocking and locking operation when the specific working condition is met, the automobile door state and/or the electric quantity state of the automobile key are/is recognize