Abstract: In order to improve the efficiency of the underground pipe network of the runway in the international metropolis, the BIM clash technology is combined with the characteristics of the construction of the underground pipe network of the airport. From the experience of the construction practice of the three runways project of the Hong Kong International Airport, this paper establishes a standardized clash coordination work flow and clash detection rules for the underground pipe network of the airport runway, and then the clash detection, coordination and scheme adjustment of the underground pipe network system of the airport runway are carried out according to these rules and processes. This paper also manages to accurately record and track the state and scheme of each clash conflict resolution in the form of model, table and mutual verification, so as to realize the clash resolution status and record real-time viewable. After the clash and scheme adjustment, the construction clash coordination deepening map and adjustment record are output according to the powerful drawing characteristics of Civil 3D software. With design approval and confirmation, it is used as a formal construction deepening drawing to directly guide the on-site construction, thus effectively improving the construction coordination efficiency of the airport underground pipe network, reducing the project rework and material waste, and reducing the project construction cost.