The invention discloses a crushing mechanism for stone processing equipment. The crushing mechanism comprises a box body, a roller is arranged inside the box body, rotating shafts are rotationally connected to the centers of the left side and the right side inside the box body through rolling bearings, the opposite ends of the two rotating shafts are fixedly connected with the centers of the leftside and the right side of the roller, the end, away from the roller, of one rotating shaft penetrates through the corresponding rolling bearing to be fixedly connected with a first belt wheel, the side wall of the roller is transversely provided with multiple evenly-distributed grooves, connection rods are arranged in the grooves, the left sides and the right sides of the lower ends of the connection rods are fixedly connected with limiting sliding blocks, the side walls of the grooves are provided with limiting sliding grooves matched with the limiting sliding blocks, and the upper ends of the connection rods extend out of the grooves and rotationally connected with crushing hammers through rotary shafts. By means of the crushing mechanism, crushed stone can be screened, large-granularity stone can be crushed for the second time, stone granularity uniformity is improved, and the labor intensity of workers is relieved.