Abstract: Under the vigorous promotion of national policies, the construction of underground pipe gallery with large investment has developed rapidly. The investors face greater financial pressure. The article analyzed the cost level and cost composition of the UPG, and discussed the influence of the construction conditions, coordination with the underground project, section size, dwell depth, the old pipelines migration to the cost level. It provides a reference for the planning and design of UPG, the estimated preparation and the cost management, and helps to control the cost of UPG effectively and the sustainable development of the UPG.