Stone crusher

The utility model discloses a stone crusher, which relates to the technical field of crushers, and comprises a machine body, the machine body consists of a feed hopper and a crushing cavity in sequence from top to bottom, the left side and the right side in the feed hopper are movably connected with buffer plates, and the lower ends of the two buffer plates are fixedly connected with a plurality of buffer springs fixed with the inner side wall of the feed hopper; the front side and the rear side of the interior of the crushing cavity are each movably connected with two coarse crushing rollers, a flow guide plate is arranged below the two coarse crushing rollers, two fine crushing rollers movably connected with the inner side wall of the crushing cavity are arranged below the right side of the flow guide plate, and a screen is arranged below the two fine crushing rollers. The left side and the right side of the lower end of the crushing cavity communicate with a connecting pipe and a discharging pipe correspon