Anti-falling sealing ring

The utility model provides an anti-falling sealing ring which comprises a sealing ring body, and an anti-falling area is arranged on the inner circumference of the sealing ring body in the height direction of the sealing ring body. The anti-slip area comprises a plurality of circles of anti-slip lines which protrude outwards or sink inwards along the inner wall of the sealing ring; the section of the anti-skid lines is triangular, square, trapezoidal, circular or elliptical. According to the sealing ring disclosed by the utility model, the anti-slip area arranged on the inner wall of the sealing ring along the height direction, the anti-slip area adopting different protective grain structures and the anti-slip area arranged on the cylindrical battery cover are matched, so that the anti-slip effect in the mounting process of the sealing ring can be realized, and a better sealing effect can be formed; the stability of the sealing ring in the cylindrical battery assembly process is met, and the assembly efficien