Abstract: The 10-m wind data of European Center for Medium-Range Weather (ECMWF)fine mesh grid from January of 2016 to December of 2018 were evaluated using various observations from 8 national meteorological observation stations in Dalian.The results indicated that the 10 m wind forecast of ECMWF fine mesh grid is the closest to the maximum wind speed, and has the best correlation with the maximum instantaneous wind speed.The whole forecast results of ECMWF 10 m wind speed for eight stations in Dalian are relatively larger on average.From the error statistical analysis between ECMWF 10 m wind forecast data and its corresponding maximum wind speed, the results showed that forecast is closest to the observation when the wind is at level 3, larger than observations when the wind is below level 3, and smaller than that when the wind is above level 3 by the classification of the observation data from the mean error (ME) of wind speed.The wind speed errors of different directions are also obvious, but smaller than those of different wind scales.Mean absolute error (MAE) is the smallest when the wind is between levels 2 and 3.There is no significant difference in ME during all the forecast times, which is mainly between 0.1-0.3 m·s^-1.But MAE increases slowly with the extension of forecast time.The wind speed errors had obvious diurnal variations, which show the characteristics of small in the day and large at night, the smallest in the afternoon, and the largest after midnight.They also vary at different stations, wind levels, and wind directions.