The invention discloses a high-efficiency solid waste smashing treatment device. The high-efficiency solid waste smashing treatment device comprises a shell. A feeding port is formed in the top of the shell. A material storage box is fixedly connected to the bottom of the inner wall of the shell. A sieving net is fixedly connected to the lower portion, located above the material storage box, of the inner wall of the shell. Two conveying devices are symmetrically arranged in the shell. A smashing motor shell is fixedly connected to the right side of the shell. A smashing motor is fixedly connected to the interior of the smashing motor shell. A smashing rotating shaft is fixedly connected to an output shaft of the smashing motor. By arranging the conveying devices, solid waste not conforming to the grain size of the sieving net is conveyed to a smashing packing auger to be smashed again, a good smashing effect is achieved, it can be guaranteed that the solid waste is smashed to grain sizes meeting requirements, the smashing effect is more ideal, influences cannot be brought to following compaction and transportation, space waste is reduced, and the working efficiency is improved.