Flattening device of corrugated paper packaging box packaging machine

The utility model discloses a flattening device of a corrugated paper packing box packing machine, which comprises a box body, a conveying belt used for moving corrugated paper needing to be packed is arranged at the bottom in the box body, a telescopic groove used for assisting subsequent parts to slide is formed in the side wall of the box body, and the bottom of the box body is provided with a pressing plate. A telescopic table used for assisting subsequent parts to be flattened is arranged in the telescopic groove, push plates used for packaging and folding the corrugated paper packaging box are symmetrically arranged on the two sides of the telescopic table, and bending plates used for folding the other two sides of the corrugated paper packaging box are symmetrically arranged on the top of the box body. By means of the parts such as the push plate and the bending plate, when a large number of paper boxes need to be bent and flattened, the push plate and the bending plate which are used for bending the p