The invention discloses a vehicle brake detection system and belongs to the technical field of vehicle detection. The vehicle brake detection system comprises a gas valve module, a switch module and adetection module, wherein one end of the gas valve module communicates with a gas storage cylinder of a vehicle; the other end of the gas valve module communicates with an ABS electromagnetic valve of an anti-lock brake system of the vehicle; when the gas valve module is switched on, gas in the gas storage cylinder can be transmitted to an ABS electromagnetic valve; the switch module is electrically connected with the gas valve module and used for controlling the gas valve module to be switched on or switched off; and the detection module is connected with a brake of the vehicle and used fordetecting a brake force of the brake of the vehicle when the gas valve module is switched on. By connecting the vehicle brake detection system to the vehicle, the brake force of the brake of the vehicle can be dynamically detected so that the brake force detected by the vehicle brake detection system more accurately and preferably conforms to actual situations; and therefore, the safety of the vehicle is guaranteed.