Folding packaging box and folding plate

The utility model relates to a folding packing box, a first horizontal part (2) of a first top and a second horizontal part (4) of a second top are overlapped to form the top surface of the folding packing box, a first side wall part (1) and a second side wall part (3) are oppositely distributed as side wall parts of the top of the folding packing box, and the first horizontal part (2) is positioned on the upper side of the second horizontal part (4). The end part of the first horizontal part (2) is provided with at least one insertion piece (5) protruding out of the end part, the second side wall part (3) is provided with an insertion hole (6), and the insertion piece (5) is horizontally inserted into the insertion hole (6), so that materials are saved, the two parts which are overlapped up and down are not easy to separate at the joint, and the firmness degree of connection is better; the utility model further provides a folding plate which is used for manufacturing the folding packaging box. 本实用新型涉及一种折叠包装盒