Round battery shell for new energy battery

The invention provides a round battery shell for a new energy battery, and belongs to the technical field of new energy batteries, the round battery shell comprises a shell body, an upper cover is arranged at the upper end of the shell body, a battery main body is placed in the shell body, a fixing mechanism is arranged in the shell body, and the fixing mechanism comprises a screw rod; a circular-truncated-cone-shaped push block is arranged at the lower end of the screw rod, the lower end of the circular-truncated-cone-shaped push block abuts against wedge-shaped moving blocks, the number of the wedge-shaped moving blocks is four, and moving plates are arranged on the sides, away from the circular-truncated-cone-shaped push block, of the four wedge-shaped moving blocks. Through arrangement of a circular-truncated-cone-shaped push block, a wedge-shaped moving block, a moving plate and a limiting insertion block I, when a battery main body needs to be replaced or maintained, only a screw rod needs to be rotated