Pipe welding forming die

The utility model discloses a pipe welding forming die which comprises a guide rail, a plurality of brackets and a welding box are detachably arranged on the guide rail, the brackets and the welding box are arranged on the guide rail in the same horizontal line, and a plurality of mounting holes are formed in the guide rail. The bracket and the welding box are close to each other or far away from each other by being arranged in different mounting holes in the guide rail, the bracket is provided with a plurality of guide plates, a welding opening is formed in the top surface of the welding box, and a clamping piece is arranged on the welding box and located at the position close to the welding opening; a welding gun adjusting mechanism is further arranged on the top face of the welding box, and the welding gun adjusting mechanism is composed of a hinge and a mounting part. According to the utility model, the guide rail, the bracket and the welding box are matched to quickly complete assembly and put into use,