In view of the high scientific research and production requirements of the EPC project in the aviation industry plant area, which involves many types of pipelines, complex processes and special laying methods, this paper explores the data fusion of BIM and GIS, forms a set of standard BIM and GIS integration technology routes(data fusion, function integration, integrated application), and constructs a unified three-dimensional underground pipeline information system, It can not only solve the vertical design problem of complex process pipelines in the aviation industry plant at the planning and design stage, provide more accurate measurement and pricing reference for the procurement and construction of EPC projects, but also realize the centralized management, unified allocation and resource sharing of underground pipeline information in the aviation industry plant. The research of this paper will also provide standard and unified underlying data and interfaces for the construction of smart operation and maintenance system in the aviation plant, and establish a basic data platform for the construction of smart factory, so as to realize the expansion of digital achievements from a single building delivery to a complete set of digital assets delivery.