Mongolia long distance and deep buried water pipeline project, the region is extremely cold, the pipeline distance is 120 kilometers long, the buried depth is 3.5~7 meters, the pipeline pressure is 0.8~2.5MPa, the pipeline installation environment is complex, and the pressure requirements are diverse. Donghong wire mesh skeleton polyethylene pipeline, with high pressure, high weather resistance and other excellent performance, successfully completed Mongolia long-distance water supply transportation task. It demonstrates the high pressure weatherability of Donghong pipeline in extremely cold environment.