Abstract: For the most widely used monopile foundation in offshore wind power,the scour depth distribution of offshore wind farms is discussed based on the measured data of offshore wind farms in Shandong,Jiangsu,Zhejiang and other places. At the same time,the theoretical scour depth of each wind farm is calculated by using Qi ＆ Gao formula,Han Haiqian formula and Wang Rukai formula,and the relationship between the calculated results and the measured data is analyzed to study the adaptability of each scour calculation method. The results show that the above three calculation methods can predict the local erosion depth of monopile foundation to a certain extent.