Sealing nail pressing mechanism and sealing nail welding equipment

The utility model relates to the technical field of lithium battery packaging, and provides a sealing nail hold-down mechanism and sealing nail welding equipment, the sealing nail hold-down mechanism provided by the utility model comprises a rotating body, a connecting piece and a driving device, the middle part of the rotating body is provided with a first through hole for the welding device to pass through, the connecting piece is arranged on the rotating body, and the driving device is arranged on the rotating body. The free end of the connecting piece is provided with a nail pressing head, the nail pressing head is located on the central axis of the rotating body, the nail pressing head is suitable for applying pressing force to the sealing nail, and the driving device drives the rotating body to rotate around the central axis of the rotating body and drives the connecting piece to rotate synchronously; when the sealing nail welding device works, a welding device can directly weld a sealing nail through t