The automobile comprehensive braking performance test system based on the existing antiforce rolling brake testing platform, increased the measuring device of brake pedal force, brake pipe pressure, the designed software system had the ability of multichannel data measuring, collecting and processing, measuring the actual ground brake force when simulate the moving vehicle. The system can boost the pressure of brake pipe by hand loading mode to the test vehicle brake pedal, synchronous measure the test vehicle brake pedal force, brake pipe pressure and the variation of the wheel brake force, when brake respond, brake force rise, continuously brake and brake relax, and then apply research achievement to accident vehicle braking performance forensic work that the brake pipe damaged but four wheels and brakes were in good condition.