Crushing device for coal gangue

The utility model relates to the technical field of coal gangue processing, and discloses a crushing device for coal gangue, which comprises a fixed seat, a crushing chamber is fixedly mounted at the top of the fixed seat, a feed port is fixedly communicated with the top of the crushing chamber, and fixed plates are fixedly mounted on two sides of the feed port. A round rod is fixedly connected between the two fixing plates. Through the arrangement of the round rod, the sealing cover, the limiting block and the fixing clamping teeth, the sealing cover can move left and right along the outer surface of the round rod due to the cooperation of the round rod and the sealing cover, and therefore the sealing cover can be driven to seal the top of the feeding port through the cooperation of the sealing cover and the feeding port; at the moment, due to the fact that a compression spring is in a compressed state, elastic force can be applied to a movable frame, a sealing cover can be limited through cooperation betwee