Abstract: In this paper the data and methods used to estimate the extreme wind speed for different return periods over the China Sea(Bo Hai, Yellow Sea, East China Sea and South China Sea) have been discussed. Since lack of successive meteorological observation at stationary sites over the sea region, comprehensive informations for the island observadons, typhoon records. ship reports and modelling data of wind speed data were used to establish the annual maximum wind speed series. The four kinds of statistical models(Extreme type Ⅰ,Lognormal. Weibull. Pearson Ⅲ) were used to fit those data series of the maximum wind speed. Test rasults have showed that Weibull distribution with three parameters has greater suitability. and the estimated extreme wind speed using the series combined SOWM data with typhoon model date were more stable and seasonable.