In order to improve the income of an oil field in the South China Sea and reduce the waste of resources and environmental pollution, the Floating Production Storage and Offloading (FPSO) is equipped with a large-scale Liquefied Petroleum Gas (LPG) recovery process system, which is independently designed, constructed, installed and maintained in China. How to improve the construction technology and project management, develop and deepen the integrated construction through the innovation of construction technology and management, so as to save the construction site space, speed up the construction process, speed up the turnover of construction auxiliary tools, and save the construction man hour investment, thus achieve the purpose of reducing the cost and increasing the efficiency of the project is expounded, which provide technical reference for the similar project.