Welding pressing tool, welding device and battery production line

The utility model is suitable for the technical field of battery processing, and provides a welding pressing tool, a welding device and a battery production line. The welding pressing tool comprises a supporting platform, a pressing nozzle and a magnetic part. The supporting platform is provided with a bearing surface for bearing a to-be-welded part; the pressing nozzle is mounted above the bearing surface in a lifting manner and is provided with a first through hole, at least part of the pressing nozzle is a magnetic part, and an included angle is formed between the axis of the first through hole and the bearing surface; the magnetic part is arranged on the supporting platform and used for applying magnetic force towards the bearing face to the magnetic part. According to the welding pressing tool, the welding device and the battery production line, the gap between the pressing nozzle and the to-be-welded part can be eliminated to a certain degree, the pressing nozzle pressing effect is improved, the risks of welding defects such as insufficient welding and burnthrough in the welding process are reduced, and the welding quality is improved.