Welding fixture

The utility model discloses a welding clamp which comprises a base, a bottom frame is arranged on the base, a sliding guide rail is arranged on the bottom frame, two first fixing seats are connected to the sliding guide rail in a sliding mode, the two first fixing seats are used for jointly supporting a first pipeline, and an adjusting screw rod is rotationally connected to the bottom frame. According to the clamp, the first fixing seat is arranged to fix the first pipeline, then the second mounting seat is arranged to fix the second pipeline, and the second mounting seat is obliquely arranged to obliquely fix the second pipeline, so that the first pipeline and the second pipeline are quickly fixed, and the first pipeline and the second pipeline are conveniently welded and connected subsequently; and meanwhile, by arranging a sliding guide rail and an adjusting screw rod, the distance between the two first fixing seats is adjusted, so that the device can adapt to pipelines I with different length specificatio