A foldable drawer storage device consisting of: one drawer and one shell. The drawer can be folded flat or expanded into a box shape. The shell can be folded flat or expanded into standing position. Folded flat, the drawer and the shell take up small space and are easy to store. When the drawer and the shell are both expanded, the shell becomes the exterior box of the drawer, which allows the drawer to be pushed into the shell. The drawer can also be pulled out, revealing the entire storage space of the drawer.