A fresh-keeping paper box with cutting function, comprising an elongated box body containing the inner cavity of a roll of cling paper and a cutter provided on the box body, characterized in that the box body is provided with a box cover The box cover is hinged with the box body, and the knife holder has a knife holder groove on the lower side of the long side of the opening of the box cover. The knife holder groove is slidably fitted with a knife holder. The knife holder is fastened with several vertical blades, and the outer end of the knife blade is in the knife holder. In the groove, the top surface of the cover has a handle for sliding the tool holder, and a cutting groove is arranged on the upper side of the opening of the box body. When the cover and the box are closed, the cutting groove fits in the groove of the knife holder. The blade fits in the cutting slot.