The invention belongs to the technical field of electric automobile braking, and particularly relates to a vacuum pump braking system for an adaptive electric vehicle, which is applied to electric vehicles. A vacuum booster of the braking system is arranged between a brake pedal and a brake master cylinder; the brake pedal is connected with the vacuum booster through a push rod; the brake master cylinder is communicated with a front wheel brake cylinder and a rear wheel brake cylinder respectively; the components of the vacuum booster, a vacuum one-way valve, a vacuum tank, a vacuum pump, a vacuum pump ECU and the like are connected in series to form a vacuum boost braking system of an electric automobile; and the vacuum pump ECU is connected with a pressure sensor and a power supply respectively. The vacuum pump braking system improves the existing vacuum boost braking system of the electric automobile, and improves the stability and the environmental suitability of the vacuum boost braking system of the electric automobile.