The invention relates to a detection system of an automobile brake inspection bench. The detection system of an automobile brake inspection bench includes a detection device on an automobile tyre on abrake bench, and a processing device which is in wireless connection with the detection device. The detection system of an automobile brake inspection bench is characterized in that the detection device includes a torque sensor which is arranged on the hub of the automobile tyre and rotates following the hub, a torsion processor and a wireless transmission module; the input terminal of the torsion processor is electrically connected with the output terminal of the torque sensor; the wireless transmission module is electrically connected with the output terminal of the torsion processor; at the braking moment through the brake, the torsion processor is driven to move by inertia, so that the torsion value can be measured and is converted into an electric signal; and wireless transmission avoids the defect that traditional limited transmission (such as the design defect of an annular coil), and can optimize the circuit and simplify components, and transmission becomes more accurate, andmeasurement becomes more convenient.