The invention provides a bicycle braking force test system test platform. The bicycle braking force test system test platform includes a front brake braking force sensor, a rear brake braking force sensor, a foot brake actuating mechanism, a hand brake actuating mechanism, a spraying and blasting system, a front wheel lever type load system, a rear wheel lever type load system, a front wheel driving roller, a rear wheel driving roller, a front wheel fixing and clamping device, a rear wheel fixing and clamping device, a power device and a control device. The test platform of the invention can be applicable to brake heat resistance tests, overall structural strength fatigue tests and wheel/tire assembly fatigue tests of various kinds of vehicles. The test platform is simple in operation. All detection performed by the platform is under digital control, man-made operation error can be avoided, data acquisition is accurate, and detection efficiency can be improved.