The utility model discloses a packaging box with a display function. The packaging box comprises an inserting piece, a first connecting plate, a first connecting lappet, a front side plate, a bottom plate, a rear side plate, an upper cover plate, a folding plate, a fourth connecting lappet, a second connecting plate, a partition plate and a first folding plate which are sequentially connected in afolded mode from left to right. The two sides of the front side plate are connected with a first dustproof piece and a second dustproof piece in a folded mode respectively. The upper side of the bottom plate is sequentially connected with the left side wall, the second connecting lappet, the left inner side plate and the first lappet in a folded mode, the lower side of the bottom plate is sequentially connected with the right side wall, the third connecting lappet, the right inner side plate and the second lappet in a folded mode, and the two sides of the right inner side plate are connectedwith the third fin and the fourth fin in a folded mode. The two sides of the upper cover plate are connected with the first cover side plate and the second cover side plate in a folded mode respectively, the two sides of the partition plate are connected with the second folded plate and the third folded plate in a folded mode respectively, and limiting holes are evenly formed in the partition plate. According to the utility model, the trouble of respectively manufacturing the lining and the outer box is avoided, so that the box forming process is quicker and simpler, and the production efficiency is improved.