Secondary impurity removal device for waste tobacco shreds

The utility model relates to a waste tobacco shred secondary impurity removal device, and belongs to the technical field of tobacco shred impurity removal. The waste tobacco shred secondary impurity removal device comprises an impurity removal box, a conveying belt, an air guide plate, an air knife, a waste box, a roller frame, an electrostatic roller, a rotating shaft, a first motor, a fixing plate, a felt plate, a negative pressure dust removal air pipe, a tobacco receiving box and a supporting frame. The material throwing roller is arranged in the impurity removal box to scatter and throw mixed materials, the air guide plate and the air knife are arranged to conduct winnowing on the mixed materials, heavy impurities are separated and discharged through the winnowing effect, light impurities are adsorbed and discharged through the static roller and the negative pressure dust removal air pipe, and the dust removal efficiency is improved. The secondary impurity removal operation of separating the pure tobacco