The invention discloses a sprocket wear test device, and relates to the technical field of sprocket test equipment. The sprocket wear test device is used for testing the degree of wear of a chain nestunder controlled impact force, friction force and number of impacts on a sprocket test piece bearing chain ring cut from a sprocket. The sprocket wear test device includes a longitudinal impact device, a horizontal clamping device and a supporting frame; the longitudinal impact device drives the chain ring to reciprocate longitudinally to impact a sprocket test piece, while the horizontal clamping device fixes the sprocket test piece, the thrust force which brings the sprocket test piece and the chain ring to be closer to each other is provided to increases the contact interaction force between the sprocket test piece and the chain ring so as to provide friction force to the sprocket test piece when the chain ring reciprocates longitudinally, before the chain ring puts into the industrialtest or is used, the sprocket wear test device is used for evaluating the degree of wear of the chain nest under the controllable impact force, friction force and number of impacts of the sprocket test piece bearing chain ring, so that the practical reliability of the sprocket can be effectively guaranteed, so that the amount of damage is reduced after the sprocket puts into industrial test or isused, and materials and resources are saved.