The utility model provides a driving wheel disk and a testing device. The driving wheel disk is used for fixing and bending submarine cables, comprises a base, a wheel disk module and a transmission module; the transmission module is fixed on the base, and the wheel disk module comprises a body and reinforcing ribs; the body is rotatably connected to the base, and is further connected with the transmission module; a race for accommodating the submarine cable is inwardly and concavely arranged at an outer periphery of the body; a first through hole and a second through hole are formed in two opposite surfaces of the body; and the reinforcing ribs are fixed on the two opposite surfaces of the body, are spirally arranged along a center of circle direction of the outer periphery of the body, and are used for winding the submarine cables penetrating through the first through hole and the second through hole. The driving wheel disk disclosed by the invention can effectively fix the submarinecables, thereby preventing the submarine cables from crossing.