Abstract: The reliability research status of offshore wind power generation is introduced. This paper analyzes the factors affecting the reliability of offshore wind power generation in detail from the aspects of marine environment, offshore wind turbines, offshore booster stations, electrical systems and operation and maintenance strategies. It is concluded that different operating environments, control strategies and operation and maintenance strategies have different effects on the reliability of offshore wind power. At the same time, this paper proposes methods for improving the reliability of offshore wind power generation in terms of condition monitoring, fault diagnosis and operation and maintenance management, which can effectively improve the reliability of offshore wind power. The technical problems worthy of further study are prospected according to the actual situation.