Folding storage box

The utility model provides a folding storage box aiming at the defect that a box cover lock catch on an existing storage box is complex in structure, and belongs to the technical field of storage boxes, the folding storage box comprises a folding box body, an opening and a cover plate are arranged on the side face of the folding box body, a clamping piece is fixedly arranged on the side wall of the opening, and the side wall, opposite to the clamping piece, of the opening is hinged to the cover plate. A locking piece matched with the clamping piece is hinged to the cover plate, and a locking groove is formed in the locking piece; a first protruding block is further fixedly arranged on the cover plate, a second protruding block matched with the first protruding block is fixedly arranged on the locking piece, and when the clamping piece is embedded into the locking groove, the second protruding block is located on the side, facing the inner cavity of the folding box body, of the first protruding block, and the