The utility model relates to the field of packaging technique, the name is fresh -keeping carton, including the carton body, the carton body has a polylith panel, the panel include side panel and bottom surface board, top surface board, each panel enclose cavity, characterized by: the cavity in placed an under blanket board on the bottom surface, the under blanket board in the middle of have an antistaling agent layer the cavity placed an upper cover plate welt above in, the upper cover plate welt in the middle of have an antistaling agent layer, under blanket board and upper cover plate welt outside plastic layer in addition, such carton have with low costs, at any time use difficultly became invalid, fresh -keeping even advantage, under blanket board and upper cover plate welt outside plastic layer in addition, also have and use the advantage of tearing at any time.