The invention discloses a material crushing machine drum convenient in regulation. The material crushing machine drum convenient in regulation comprises a material crushing machine body; a first bearing and a second bearing are installed on the two sides in the material crushing machine body respectively; a rotary shaft installed at the output end of a motor penetrates through the first bearing tobe connected with the second bearing and is provided with a rolling shaft; the surface of the rolling shaft is provided with mounting holes; the rolling shaft is provided with material crushing blades at the position of the mounting holes respectively; the bottoms of the first bearing and the second bearing are provided with rolling nuts respectively; a screen is arranged in the material crushingmachine body below the rolling shaft right; the two ends of the surface of the screen cloth are provided with third bearings respectively; and a first rolling screw rod and a second rolling screw rodboth penetrate through the rolling nuts and are connected with the third bearings respectively. By arranging a structure with the first rolling screw rod, the second rolling screw rod, the mounting holes, fastening bolts and the third bearings, the material crushing machine drum convenient in regulation solves the problems that a regulation function is not provided, the material crushing blades are inconvenient to mount, and the unloading speed cannot be improved.