Control method and system for braking deceleration response of automobile

The invention discloses an automobile braking deceleration response control method, which comprises the following steps of: after an automobile is started, acquiring the automobile speed in real time, and when the automobile is at a low speed, acquiring a brake pedal signal and judging that the automobile is non-emergency braking, and building pressure at a preset low speed by an auxiliary main cylinder to quickly stop the automobile; and if the obtained brake pedal signal is judged to be emergency brake, the auxiliary main cylinder builds pressure at a preset rapid rate so that the vehicle can be rapidly stopped. According to the method, the vehicle speed reference signal calculation logic is added on the basis of the on-line control brake assistance system, only the software control logic is added, no hardware development is needed, the braking nodding problem can be effectively solved under the condition that an automobile suspension is not changed at all, and the comfort of the whole vehicle is improved.