Screening and impurity removing device

The utility model discloses a screening and impurity removing device, which relates to the technical field of screening and impurity removing, and comprises a water tank, a bottom plate is fixedly arranged below the water tank, a hydraulic cylinder is arranged on the upper surface of the bottom plate, the output end of the hydraulic cylinder is fixedly connected with a sliding block, a supporting frame is arranged above the hydraulic cylinder, and the sliding block is fixedly connected with the supporting frame. A second sliding groove is formed in the bottom face of the supporting frame, the sliding block is slidably connected to the interior of the second sliding groove, the other end of the supporting frame is fixedly connected with a washing box, the two side faces of the washing box are both fixedly connected with first connecting rods, and the other ends of the two first connecting rods are both fixedly connected with sliding plates. And reciprocating pushing mechanisms are fixedly mounted on the outer