Abstract: Floating production facility is one of the main modes of offshore oil and gas field development. The installation of mooring system is the most important technology of floating production facilities, and has become the focus of the research of marine engineering industry. In combination with the mooring system installation practice of floating production facilities in the South China Sea, we analyze and discuss the type of mooring system, the installation process, the key technology of installation, the installation control points as well as the control solutions to the key problems. At the same time, we also compare the technical characteristics of the installation of the shallow water and deepwater mooring systems, and put forward the key technology of deepwater mooring system installation.