The invention provides a renewable sponge laminating device. The renewable sponge laminating device comprises a base. Supporting plates are arranged on both the left and the right sides of the upper end of the base, the supporting plates and the base are connected in a fastening mode through supporting plate rib plates, and the tops of the supporting plates are fastened to hot-pressing pulling plates through bolts; and the renewable sponge laminating device further comprises hot-pressing devices fixed at the front ends of the hot-pressing pulling plates. According to the renewable sponge laminating device, the structure is simple, the design is novel, and the renewable sponge laminating device is convenient to carry; sponges are laminated by adopting the hot-pressing devices, hot pressing is conducted through the adjustment of a hydraulic-pressure air cylinder and a heating seat, after the hot pressing is completed, elastic force exists in a rectangular spring, so that the hydraulic-pressure air cylinder reverts to an original position, the operation is very convenient, and the hot-pressing effect is good; and lamination of the sponges with different specifications can be conducted on the position of a single-unit laminating device through the replacement of pressing blocks and cushion blocks, and the applicability of the renewable sponge laminating device is promoted greatly.