Multifunctional metal welding tool

The utility model discloses a multifunctional metal welding tool which comprises a welding table, two pairs of welding lead screw modules and a pair of welding supporting blocks, a pair of welding grooves are horizontally formed in the welding table in parallel, and the two pairs of welding lead screw modules are installed on the inner sides of the welding grooves in parallel respectively. The pair of welding supporting blocks are installed at the moving ends of the two pairs of welding lead screw modules correspondingly, and a rotary fixing structure and a movable welding structure are installed on the pair of welding supporting blocks. The utility model relates to the technical field of welding tools, pipe materials and pipelines are limited through a rotary fixing structure, meanwhile, a pair of pipeline raw materials are extruded and limited through the rotary fixing structure, and the pair of pipelines are extruded and welded together in a hot melting mode by rotating the pair of pipelines reversely. And