The overall protection of the ancient capital style is one of the important contents of the protection of Beijing's famous historical and cultural city.with the overall planning of Beijing, the overall protection of the old city and the concept of the protection of historical blocks are constantly improved.,the government's research on the historic district protection project is more in-depth.In order to promote the old city renewal,improve the living environment,promote urban tourism, promote the economic development of historic districts,the comprehensive renovation of historic blocks is extremely urgent.In the process of remediation,the pipeline under the block is complicate、the pipeline is damaged seriously、the municipal pipeline is mixed and other problems are prominent,the current situation of municipal pipeline transformation is facing great test and difficult problems.Combined with actual situation,analyze and solve the problems of current situation transformation.