Welding head and welding device

The utility model provides a welding head and a welding device, and relates to the technical field of welding. The welding head is provided with a mounting end and comprises a main welding part and an auxiliary welding part. Main welding teeth are arranged at one end, deviating from the mounting end, of the main welding part in the first direction. The auxiliary welding part is located on the side of the main welding part, and auxiliary welding teeth are arranged at the end, away from the mounting end, of the auxiliary welding part in the first direction. Wherein in the first direction, the auxiliary welding teeth are closer to the mounting end than the main welding teeth. During welding, the main welding teeth on the main welding part are in full contact with the workpiece, a main welding area for full welding is formed on the workpiece, the auxiliary welding teeth on the auxiliary welding part are closer to the mounting end than the main welding teeth, so that the auxiliary welding teeth are not in full con