The invention discloses tangential final-motion frictional wear test equipment. The equipment is characterized in that a lateral hydraulic piston connected with a data acquisition and control system is connected with a hinged shaft at the middle upper part of a vertical connecting rod; the upper end of the connecting rod is connected with one side of an upper test piece chuck through a cross bar; the other side of the upper test piece chuck is connected with a tangential displacement sensor fixed on the side wall of an experiment medium cavity; the upper test piece chuck is used for clamping a spherical test piece; a lower test piece chuck for clamping a plane test piece is arranged right below the upper test piece chuck; the lower test piece chuck is fixed at the bottom of the experiment medium cavity; the bottom of the experiment medium cavity is arrange on two longitudinal supporting rods; and a deformation sensor is arranged between the top of the longitudinal supporting rods and the bottom of the experiment medium cavity. The tangential final-motion frictional wear test equipment can effectively simulate the tangential final-motion friction and has the advantages of simple structure and high test precision, is convenient to maintain, can carry out a final-motion frictional test under the medium conditions, such as controllable high temperature, lubrication and liquid, and can provide more accurate and reliable test bases for designing, manufacturing and maintaining relevant parts.