Electric bicycle or electric motorcycle performance testing platform seat hold-down device

An electric bicycle or electric motorcycle performance testing platform seat hold-down device comprises a base, a front wheel drive part and a rear wheel drive part. Both the front wheel drive part and the rear wheel drive part are mounted in the base. The base is slidably equipped with a clamping device thereon for fixing a vehicle seat. The clamping device includes a supporting column, a cross beam and a hold-down unit. The supporting column is vertically mounted on the base. The supporting column is slidably and adjustably connected with the base. One end of the cross beam is fixedly connected with the supporting column. The hold-down unit is mounted on the other end of the cross beam in a lifting and buffering manner. The hold-down device can buffer and press fit the seat of a vehicleto be tested, can simulate the pressure of the weight of a human body on the seat, can achieve the buffer connection of a lifting rack and the seat of the vehicle to be tested, provides a certain amount of vibration margin an