Novel external channel high efficiency double-bin sieve

The utility model discloses a novel external channel high efficiency double-bin sieve which comprises a rack and a sieve box which is connected with the rack through a hanging device and is a rectangular cavity body formed by uprights, a base and upper square steel. Wall boards and a sieve door are arranged on upright walls around the cavity body. A middle wall board which divides the cavity body into two cavities is arranged in the middle of the inner cavity of the cavity body. A drive device is arranged in the lower middle portion of the sieve box and connected with a power device arranged on the outer side of the sieve box. Each cavity is sequentially provided with a top grid, a sieve grid and a bottom grid. An external channel is formed by the wall boards and the four upright walls of the sieve grid. A sieve upper material channel and a sieve lower material channel are respectively arranged inside the external channel. The novel external channel high efficiency double-bin sieve is flexible and changeable