This series of suitcase represents innovation and improvement of the folding and storage function, solving the problems of insufficient rigidity, easy deformation, and cumbersome folding that afflict most foldable suitcases on the market. It can be folded by one person or with one hand to the thickness of a book, making it convenient for both storage and carrying. When the suitcase is not in use, it can be quickly folded and stored without occupying much space.