The outer sleeve of the pipeline joints uses heat shrinkable tape technology to clean soil and debris from both ends of the pipe. The cleaning width is greater than the width of the heat shrinkable tape, and the bonding area of the heat shrinkable tape is abraded. Bake the bonded section of the heat shrinkable tape to dry the pipe surface. Wrap the heat shrinkable tape around the joint, positioning it centrally over the welding seam. Evenly heat the outer sleeve along the circumferential direction, with the flame direction from the center of the heat shrinkable tape to the outer sleeve. Once fully contracted, excess hot melt adhesive should ooze out along the edges, ensuring the heating temperature is not too high and no charring occurs. After complete shrinkage, reheat the bubble-containing areas to smooth them out entirely.