The invention discloses a crushing cover structure of a double-shaft crusher. The crushing cover structure comprises an upper cover and a screen, wherein the upper cover is positioned above double cutter shafts; a feed port is formed in one end, corresponding to the double cutter shafts, of the upper cover; the screen is positioned below the double cutter shafts; screen holes are formed in the screen; an oversize product outlet is formed in one end, far from the feed port, of the screen; and the screen slides in the setting direction of the double cutter shafts to guide garbage materials to enter the crusher from the feed port in one ends of the cutter shafts and to be discharged through the screen holes below the screen and the oversize product outlet so as to achieve material type separation. In addition, a screen body is reinforced through a support plate, so that the strength of the screen body is improved, the deformation of the screen body caused by extrusion in the crusher operation process is prevented, and the operation stability of the crusher is improved.