Machine tool tailstock assembly

The utility model provides a tailstock assembly of a machine tool, and belongs to the technical field of machinery. The tailstock assembly solves the problem that an existing tailstock assembly is poor in working stability. The machine tool tailstock assembly comprises a base body and a hydraulic cylinder installed on the base body, a horizontally-arranged installation barrel is formed at the top of the base body, a sliding sleeve is arranged in the installation barrel, the rear end of the sliding sleeve is connected with the hydraulic cylinder, the outer side face of the sliding sleeve and the inner side face of the installation barrel are circumferential faces matched with each other and attached together, and a round pipe body is vertically formed on the base body and located on one side of the installation barrel. A receding hole communicating the mounting cylinder with the circular pipe body is formed in the side wall of the mounting cylinder in the radial direction in a penetrating mode. An upper column