The invention relates to the technical field of food packing, in particular to a five-cereal automatic boxing machine. The five-cereal automatic boxing machine comprises a main frame, a first motor, abox storage frame, a box sucking mechanism, a driving roller, a conveying belt, a storage device, a pushing mechanism, a feeding and box sealing mechanism, a driven roller, a controller, a box sealing frame and a storage frame; after the box sucking mechanism sucks packing cartons from the box storage frame and conveys onto the conveying belt, the packing cartons are expanded on the conveying belt; when the packing cartons move in front of the storage device, five storage boxes of the storage device are filled in sequence to finish filling of five different cereals; and after filling is finished, the side tongue and large tongue folding is performed by the feeding and box sealing mechanism to finish the box sealing of the cartons. The five-cereal automatic boxing machine can realize full-automatic box packing of five different cereals to greatly improve the boxing efficiency of the five cereals, and has such advantages as simple structure, reasonable design, convenient operation, timeand power saving and high reliability.