Coal crushing device for coal preparation

The utility model discloses a coal crushing device for coal preparation. Including a base, a crushing box is fixedly mounted in the middle of the top of the base; a cavity is formed in the crushing box; rotating shafts are connected to the cavity walls of the two sides of the cavity in an inserted mode through embedded bearings, the surfaces of the rotating shafts are sleeved with crushing rollers, one ends of the rotating shafts are connected with output shafts of first driving motors in an inserted mode, the first driving motors are fixedly installed in motor boxes through screws, and the motor boxes are fixedly connected with the outer wall of the crushing box through screws. The utility model discloses a coal crushing device for coal preparation. A crushing roller in the cavity is driven to rotate through a mounted first driving motor; the coal which does not pass through the filter screen is continuously crushed, so that the complete crushing of the coal is guaranteed, the coal crushing quality is improv