The invention relates to a performance test platform for a motor-assisted bicycle and a moped. The performance test platform for the motor-assisted bicycle and the moped includes a pedestal provided with a seat compaction and fixation apparatus. The pedestal is also provided with a centre shaft driving device which includes a centre shaft driving motor and a centre shaft driving activation lever. The centre shaft driving activation lever is drivingly connected to the centre shaft driving motor. A slide carriage is slidably mounted at the rear portion of the pedestal. A pair of rear axle rolling wheels is mounted on the slide carriage. The rear axle rolling wheels are drivingly connected by a synchronous notched belt A. A pair of front axle rolling wheels is rollingly arranged at the front part of the pedestal. The front axle rolling wheels are drivingly connected by a synchronous notched belt B. The front axle rolling wheels are drivingly connected with the rear axle rolling wheels, wherein one front axle rolling wheel is drivingly connected with a dynamometer motor. The performance test platform for the motor-assisted bicycle and the moped can conveniently test the performance of electric vehicles with front motors.