Dry-mixed mortar crushing and screening device

The utility model relates to the technical field of dry-mixed mortar processing equipment, in particular to a dry-mixed mortar crushing and screening device which comprises a support, a treatment cabinet with the upper surface and the lower surface open is arranged on the support, the upper end of the treatment cabinet is fixedly connected with a feeding hopper, and the lower end of the treatment cabinet is fixedly connected with a discharging hopper. The crushing assembly comprises rotating shafts rotationally connected to the side wall of the treatment cabinet, a motor is fixedly connected to the outer side wall of the treatment cabinet, an output shaft of the motor is fixedly connected to the end of any rotating shaft, the rotating shafts are fixedly sleeved with rollers located in the treatment cabinet, the side walls of the rollers are fixedly connected with a plurality of crushing blades, and the crushing blades on the side walls of the two rollers are arranged in a staggered mode. The ends of the two r