Fabricated building material steel bar welding device

The utility model relates to the technical field of reinforcing steel bar welding, in particular to an assembly type building material reinforcing steel bar welding device which solves the problem that in the prior art, when reinforcing steel bars with different lengths need to be supported, a supporting structure is inconvenient to adjust, and then the reinforcing steel bar machining efficiency is reduced. An assembly type building material steel bar welding device comprises a mounting plate, a transverse plate and two connecting pieces arranged at the two ends of the transverse plate, the mounting plate is fixedly connected to the center of one side of the transverse plate, and a plurality of butt joint blocks are arranged on one side of each connecting piece. Through the arrangement of the mounting plate, the transverse plate, the connecting pieces and the butt-joint blocks, welding equipment is mounted on the top of the mounting plate, then the two connecting pieces are connected to the two ends of the tr