The invention relates to the technical field of packing boxes, in particular to a paper packing box. The paper packing box consists of a box body and a box cover; the box surface of the box body and the box cover is quadrangular; four sides of the box surface extend outwards to form side walls; a folded angle is formed between adjacent side walls; and a folded line is formed on the folded angle. The paper packing box has simple structure and strong anti-vibration capability, and saves a great amount of time and materials during manufacture.