Pressing jig for welding and welding auxiliary device

The utility model discloses a downward pressing jig for welding and a welding auxiliary device, the downward pressing jig for welding comprises a lifting piece, and a floating pressing block and a blowing assembly which are respectively arranged on the lifting piece, the floating pressing block can float up and down relative to the lifting piece, and the blowing assembly is used for blowing inert gas. The air blowing assembly comprises an air pipe valve and an air blowing workpiece, an air channel is formed in the air blowing workpiece, the air blowing workpiece is further provided with an air inlet and an air outlet which are communicated with the air channel, and the air inlet is in butt joint with the air pipe valve. The downward pressing jig for welding is provided with the blowing assembly, inert gas can be blown to the welding position of the material belt in the material belt welding process, and therefore the phenomena of welding slag adhesion and oxidation are prevented during welding, the attractive