Abstract: With the continuous development of urban construction scale,in order to meet the growing demand for urban heating,fully implement national policies on ecological protection,clean heating and sustainable development,and reduce the pressure of urban environmental governance,urban heating sources are gradually away from cities,forming many long-distance heating pipelines characterized by long-distance heating and large-scale heating.Due to the location relationship between heat sources and cities,long-distance heating pipelines often cross through complex obstacle areas.This research takes Fulaerji power plant to Qigihar long distance heating pipelines project through the flood section pipe network as a case,from the pipeline crossing obstacle area design,flood prevention design and construction temporary road design three aspects to analyze the difficulties of heating pipeline crossing flood area.