Abstract: This paper aims to improve the limitations of traditional economic evaluation methods of offshore wind power. The offshore wind power operation and maintenance process considering meteorological accessibility is first analyzed based on the impact of meteorological conditions. Then,we propose the method of calculating economic evaluation indexes including downtime,power loss,wind farms availability,operation and maintenance cost. The benefit simulation model of offshore wind power operation and maintenance is established based on Anylogic platform. The real-time status of wind turbines,ships and personnel and the statistics of various economic evaluation indexes are simulated to evaluate the economic benefits of operation and maintenance of offshore wind power farms.Finally,the case results show that the proposed model can simulate the operation and maintenance process of offshore wind power farms and accurately calculate the key indicators such as downtime,power loss,wind farm availability,operation and maintenance cost. The impact of offshore meteorological conditions on the economic effect is truthfully reflected,which provides technical reference for the operation and maintenance of offshore wind power farms.