Pipeline splicing device for house building water heating construction

The utility model discloses a pipeline splicing device for house building water heating construction, which comprises a mounting frame provided with a slot, a driving motor is mounted on the mounting frame, and a rotating shaft positioned above the inner bottom wall of the mounting frame is horizontally mounted at the output end of the driving motor; the device further comprises a welding piece, a cutting piece and a clamping piece, the welding piece is located in the mounting frame, and the outer side wall of the welding piece abuts against the middle section of the rotating shaft to achieve friction transmission connection. The two cutting pieces are symmetrically located on the two sides of the welding piece, each cutting piece is rotationally connected with the welding piece, and each cutting piece is fixedly connected with the inner bottom wall of the mounting frame; the two clamping pieces are located on the sides of the two cutting pieces correspondingly, and each clamping piece abuts against the rotat