The invention discloses a vehicle shock absorber test-bed by adopting a sine transmission device, which comprises a base and a sine transmission device, wherein a vertical column is arranged on the base and provided with a beam which is provided with a fixture, a rotation shaft of a crank disk is connected with a transmission device which is connected with an electromotor, a crank shaft is arranged on the crank disk, the shaft center of the crank shaft is positioned in an eccentric position of the crank disk, the sine transmission device comprises a main sliding block and a secondary sliding block, one end of the sliding block is provided with a bearing seat hole, a bearing is arranged between the bearing seat and the crank shaft, the other end of the secondary sliding block is horizontally and movably connected with the main sliding block, the main sliding block is vertically and movably sleeved on the base, and the main sliding block is provided with a lower fixture matching with the fixture for installing a test piece of a vehicle shock absorber. The invention can effectively remove mechanism kinematic error and has good reliability, convenient manufacturing and replacement andlong service life.