Double-layer drum type tobacco flake efficient directional screening device

The invention relates to a double-layer roller type tobacco flake efficient directional screening device which comprises a feeding mechanism, a double-layer roller structure, a negative pressure mechanism and a conveying mechanism. A feeding port of the feeding mechanism is formed in the front end of the double-layer roller structure, and the negative pressure mechanism is arranged on the periphery of the double-layer roller structure. Tobacco leaves enter the space between the double-layer roller structure and the negative pressure mechanism through the feeding mechanism, enter the double-layer roller structure to be screened and classified after being fully dispersed under the action of the negative pressure mechanism, and are separated into tobacco leaves, fragments and powder according to the structure size of the tobacco leaves. The conveying mechanism is arranged below the double-layer roller structure, the classified tobacco leaves and fragment parts are conveyed to the next procedure, and the fragment