Pipeline welding positioning device

The utility model provides a pipeline welding positioning device which comprises an installation frame, two installation rings are installed on the installation frame, adjusting blocks capable of sliding in the radial direction of the installation rings are symmetrically distributed on each installation ring, and the adjusting blocks can be fixed to the fixing positions of the installation rings after the radial sliding amount of the adjusting blocks is adjusted through telescopic sliding devices. One side of the inner end of the adjusting block is a wedge-shaped cambered surface with a large outside and a small inside, and the other side of the inner end of the adjusting block is an equal-diameter cambered surface. The adjusting block and the telescopic sliding device are used for adjusting butt joint positioning of the two welded pipelines, the problem that the pipelines are prone to deviation during fixing when being manually positioned is solved, the structure is simple and compact, positioning is accurat