To solve the problems of slow construction speed, difficult construction quality control, high construction safety risk and poor economy in the renovation of the upper structure of traditional liquid dangerous goods dock, the key technologies of modular pipe gallery structure are studied.The structure is applied in the renovation of liquid dangerous goods dock for the first time, and the key technologies such as size control, limit measures, detection and deviation correction measures in the structural design and assembly construction process of modular pipe gallery are extracted, and BIM technology is combined to manage the construction process.The results show that the application of this structure can greatly shorten the construction period, reduce the safety risk during the construction period, improve the quality of the project, greatly reduce the impact on the operation of the built wharf and improve the economic benefits.