The utility model relates to the field of storage cabinet discloses a folding storage cabinet, including bottom layer cabinet body unit, a plurality of middle layer cabinet body unit, top, cabinet door subassembly, the upper and lower ends of middle layer cabinet body unit are detachable connection top and bottom layer cabinet body unit, and bottom layer cabinet body unit and middle layer cabinet body unit all include same backboard and two side plates, and bottom layer cabinet body unit includes bottom layer base, and bottom layer base includes bottom plate department and the connecting portion that protrudes on the edge top of bottom plate department, and middle layer cabinet body unit includes middle layer base, and middle layer base is through and also includes connecting portion, and middle layer base is equipped with the opening of cabinet door subassembly embedding, and the lower end of backboard and side plate all hinge in the upper end of connecting portion and have the folding state of inwardly folding to fit, and the left and right two side walls of backboard are clamped the side wall of two side plates respectively, and the upper end of backboard and side plate all are clamped in the bottom of top or the bottom of connecting portion, increase the article height, make clothes can hang and place storage, reduce the space occupied, be convenient for transportation storage.