The invention discloses a non-standard container extension device. The non-standard container extension device structurally comprises extension rods, shaft rotating transmission rods, rotating bearings, mechanical shutter blinds, an air permeable rack pipe, extension rod tail sleeves, container welding plates, carrying lifting rings, a container shell frame, folded corner anti-collision blocks, moving universal wheels, a container door plate, a left container door cover plate and a right container door cover plate. The extension rods are provided with extension rod bodies, rubber rings, fastening thread columns, hexagonal nut seats and tension wheel discs, and the extension rod tail sleeves are composed of extension rod tail seats, extension rod tail cylinders and extension rod shaft sleeve column cylinders, so that multi-position mechanical transmission and connection matching of the non-standard container extension device are achieved; operation is easy, therefore, a non-standard container is matched with extension operation efficiently, conveniently and rapidly, and the efficient carrying action is achieved; and by being extended, the container can be also folded, so that the bidirectional effects and functions are powerful, and the extension efficiency of the container is further improved.