The utility model discloses a small packaging bag, which is used for solving the technical problems that the shell food shells are thrown everywhere, and has the functions of environmental protection and convenience. A layer of composite film and bag body is formed on the outside or inside of the existing small package to form a space, which is a spare bag. Spare bags are used to store food husks. The utility model has the advantages of simple structure and convenient use. When edible hull food is used, the waste hull can be placed in the space of the spare bag of the packaging bag, so that the husk is not easy to be spilled.