The creation touches a battery thick steel shell and its consumption process. The battery thick steel shell is a hollow cylinder with a positive head blocked, a shell opening and an open, and the wall thickness of the middle section of the hollow cylinder is smaller than that of the positive head and the shell wall. thick. The utility model is characterized in that the multi-station automatic punching machine is successively subjected to blanking and shallow drawing into a bowl-shaped blank; further stretching, reducing the diameter of the blank, increasing the height, preserving the wall thickness of the positive electrode head, and reducing the wall thickness of the middle section of the hollow cylinder; Deep drawing, reducing the diameter, increasing the height, reducing and maintaining the outer diameter of the hollow cylinder and the wall thickness of the middle section to the specified thickness of the design request; forming the deep-drawn shell mouth, insisting that the thickness of the shell mouth is equal to the thickness of the blank; The plastic positive head and the stamping secondary step are adhered to, and the thickness of the positive electrode is equal to the thickness of the blank; the scrap of the shell is punched and cut, and the scrap of the thick steel shell is processed. The creation can increase the internal volume of the battery steel shell, thereby increasing the filling amount of the active material, improving the discharge performance of the battery, and prolonging the service life.