Pipeline welding auxiliary device

The utility model relates to a welding auxiliary device, in particular to a pipeline welding auxiliary device. The utility model provides a pipeline welding auxiliary device which is simple, convenient and feasible, can be accurately butted, and effectively improves the welding efficiency. The pipeline welding auxiliary device comprises a first clamping block, a second clamping block, a first supporting rod, a second supporting rod, a second clamping block, a third supporting rod, a fourth supporting rod and a fourth supporting rod, and a sliding groove is formed in the middle of the first supporting rod; the connecting rod is arranged at the upper end of the first supporting rod; a threaded hole is formed in the middle of the top of the connecting rod, and the threaded rod is rotationally arranged in the threaded hole in the top of the connecting rod; the handle is arranged at the top end of the screw rod; and the sliding block is arranged at the bottom of the screw rod. When the handle is rotated downwards,