Motor vehicle having passive protection function and passive protection method of motor vehicle

The invention discloses a motor vehicle having a passive protection function. The motor vehicle comprises a passive protection module which is arranged at the forefront end of the exterior of a vehicle body, wherein the passive protection module comprises a trigger device and a buffer device; the trigger device comprises a trigger plate and a trigger switch; the buffer device comprises a safety drug chamber and a safety airbag; the trigger plate is connected with the trigger switch; the trigger switch is connected with the safety drug chamber and controls the safety drug chamber to generate air; the safety drug chamber is directly connected with the safety airbag; the trigger plate is positioned at the forefront end of the vehicle body; and when an obstacle is contacted with the trigger plate, the trigger switch is turned on, the safety drug chamber starts to generate the air, the air is inflated into the safety airbag, and the safety airbag is opened, so that collision between the motor vehicle and the obsta