The creation touches a battery steel shell and a manufacturing method thereof, and a shaping abrasive and a battery, the battery steel shell includes a steel shell, the steel shell has an inner cavity, and the steel shell is axially included along the steel shell The end surface is an opening portion of the opening tooth and a receiving portion integrally connected with the tooth opening portion and having a base, and the diameter of the inner wall of the opening portion is larger than the diameter of the inner wall of the receiving portion. The diameter of the inner wall of the opening portion of the steel shell casing is larger than the diameter of the inner wall of the housing portion adapted to the outer diameter of the battery core, so that the opening portion provides a larger battery cell when the battery cell is placed in the steel shell The space allows the battery cells to not have problems such as smashing and smashing, and avoiding damage or deformation of the battery cells, greatly improving the quality and consumption rate of the rechargeable batteries. At the same time, the tooth opening portion can be gathered to the inner side under the shaping action of the shaping abrasive tool, and has the same diameter as the inner wall of the accommodating portion, and adheres to the same shape as the accommodating portion, thereby ensuring the appearance rule and the appearance of the steel shell shell.