The reliability analysis of the subsea production system is carried out based on the fuzzy fault tree. The working principle and structure composition of the subsea production system are analyzed, and the fault tree model is constructed from top to bottom. The uplink method is used to determine the minimum cut set of the system qualitatively. The trapezoidal fuzzy number is used to carry out fuzzy quantitative analysis on the system, and the fuzzy failure probability and fuzzy importance of the basic events are obtained. By analyzing the results, the weak links of the system can be found out, the measures can be taken to protect and monitor the system regularly, and the optimization and improvement of the subsea production system can also be guided.