Based on the monthly CCMP sea surface wind speed data,the wind speed data from coastal meteorological stations and the NCEP/NCAR reanalysis data from 1988 to 2017,this paper analyzes applicability of CCMP sea surface wind speed data in coastal areas of Zhejiang Province,and interannual variation characteristics and possible causes of sea surface wind speed in coastal areas of Zhejiang Province.Results show that:by comparing CCMP sea surface wind speed data with sea surface wind velocity data observed by typical coastal meteorological stations(Shengsi,Putuo,Dachen,Yuhuan and Dongtou stations) in Zhejiang Province,the wind speed trends of the two sets of data are basically the same,and the deviation between the two sets of data is small.It is reasonable and credible to study the interannual variation characteristics of wind speed in Zhejiang coastal area by using CCMP sea surface wind speed data.Empirical orthogonal function(EOF) analysis results of CCMP wind speed anomaly field show that:the variance contribution rate of the first mode is 90.9% and the spatial field shows a consistent pattern;the variance contribution rate of the second mode is 6.09% and the spatial field shows a dipole variation pattern.According to the variance contribution rate of the first mode and its spatial field distribution,the wind speed in the whole coastal area of Zhejiang Province can be studied as a whole.The annual average wind speed series of Zhejiang coastal CCMP from 1988 to 2017 shows that the coastal sea surface wind speed has changed from rising to falling before and after 2002.The analysis of land-sea temperature shows that the possible reason for the change of sea surface wind speed in Zhejiang coastal area is that the land temperature rises too fast.