Hydraulic uncovering system for efficient classifying screen

The utility model discloses an efficient hydraulic uncovering system for a classifying screen, which relates to the technical field of classifying screens and comprises a machine body and a cover body crossing the machine body, supporting tables are arranged at the positions, corresponding to the two ends of the cover body, of the machine body, and the cover body comprises a first fan-shaped cover and a second fan-shaped cover. The adjacent sides of the first fan-shaped cover and the second fan-shaped cover are hinged to each other, the other side of the first fan-shaped cover is hinged to the machine body and driven by a hydraulic cylinder to rotate, the other side of the second fan-shaped cover is fixedly connected with a reinforcing rod, and a limiting piece is arranged at the position, corresponding to the reinforcing rod, of the machine body. A movable support is hinged to the end of a piston rod of the hydraulic cylinder, the movable support penetrates through the first fan-shaped cover and is in slidin