a vehicle collision control system has a distance measuring sensor , a collision predictive device for outputting a collision predictive signal , a deceleration calculating device for calculating a first limit deceleration allowing the vehicle to run while braking without losing its stability and a second limit deceleration for making the collision speed lower than a survival space ensuring speed , an arithmetic processing device for outputting a braking start signal upon comparing the aforementioned limit decelerations which change according to the running of the vehicle after the collision predictive signal is outputted , a braking command device for commanding a predetermined braking force to a braking device upon receiving the braking start signal , an impact sensor for sensing , and a collision signal generating device for outputting a collision occurrence signal to the logic circuit when the impact sensor senses the collision , so that an ignition signal is outputted to the inflator of the air bag device according to a logical product between the collision predictive signal and collision occurrence signal .