Using the comparison of the conventional observation data of 20 meteorological stations and the reanalysis data of ERA-Interim, JRA-55 and CFSR in coastal zone of Liaoning Province from 1981 to 2015, the adaptability of reanalysis wind velocity field in coastal zone of Liaoning Province were discussed. The results show that the correlation between the three reanalysis data and the observed data is significant, and ERA-Interim is the best. But the maximum hourly wind speed of ERA-Interim data is obviously smaller than the observed data. The spatial deviations of the three kinds of reanalysis data are obviously heterogeneous, what is smaller in Suizhong and Xingcheng but larger in Lushunkou. The absolute deviation of the maximum hourly wind speed of CFSR is less than 1, and the applicability is better. The wind speed of ERA-Interim data is close to that of observation data, and the deviation of maximum hourly wind speed and gale number at 14:00 (Beijing time, the same as after) was smaller than that at 08:00. The mean absolute error of maximum hourly wind speed in the three sea areas is not significant, which is between 1.5 and 3 m·s-1, and the error of gale number is significant. The error of Bohai Strait is relatively large, the northern part of Yellow Sea and the northern part of Bohai Sea are the least. The mean absolute error of wind speed of CFSR data is the smallest. The observed data of maximum hourly wind speed and the number of wind events were significantly decreased, the JRA and CFSR data showed a slow decreased trend, while the ERA data showed an increased trend. The interdecadal curve of ERA and JRA data fluctuated smoothly, which could not show the interdecadal variation trend of the observed data, the CFSR data is close to the observed value, but the trend is slower than that of the observed data. In point of the spatial distribution of long-term trend, CFSR data credibility is relatively better, JRA data is second, and the difference of ERA-Interim data is larger.
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