A CATHODE SHELL OF ALUMINIUM POT, including walls and a bottom, cradles, embracing walls and bottom and installed with a spacing all along the cathode shell, as well as elements, connecting the cradles, wherein the walls and the bottom are used as connecting elements; the thickness of connecting elements making up 0.025-0.06 of spacing between cradles installed and the ratio of cross-sectional height of the cradles to the thickness of connecting elements making up 15-30.