Based on the wind speed data of Chongwu Meteorological Station from 1973 to 2006

the design wind speed of this area is calculated and analyzed by Gumbel extreme value type I distribution

Frechet extreme value type II distribution and Weibull extreme value type III distribution respectively.The results show that the probability of strong wind occurring in this district is very high.Because of the influence of typhoon

the yearly maximum wind speed always occurs between July and October

and the value of maximum wind speed has a decreasing tendency.By means of kolmogorov test of goodness of fit

the Gumbel extreme value type I distribution is the optimum curve to fit wind speed distribution of this district.Extreme wind speed has a great effect on transmission towers along coast

and it can be considered by different design method.