Coal gangue crushed material screening device

The utility model discloses a coal gangue crushed material screening device which comprises a supporting frame, the supporting frame is fixedly connected with a supporting plate, the supporting plate extends downwards in an inclined mode, a first bearing assembly, a second bearing assembly and a third bearing assembly are arranged at the upper end of the supporting plate, and a rotating rod is arranged on the first bearing assembly, the second bearing assembly and the third bearing assembly in a penetrating mode. The rotating rod is obliquely provided with a screen drum between the first bearing assembly and the second bearing assembly, the rotating rod is connected with the screen drum through a plurality of sets of connecting rods, each set of connecting rods is provided with a plurality of protruding teeth, a plurality of screen holes are evenly distributed in the screen drum, and the rotating rod is obliquely provided with a smashing box between the second bearing assembly and the third bearing assembly.