Abstract: Based on wind data of a severe typhoon observed by two meteorological towers and one motive wind profile radar which are located on both sides of Qiongzhou Strait at the inshore sea, the gale features of the severe typhoon Neasat (2011), maximum wind speed, gust factor and wind profile index variation characteristics of typhoon Neasat (2011) are analyzed.On the right side of the typhoon path, the wind direction is clockwise on the Northern Hemisphere; the maximum 10-minute average wind speed observed in typhoon eye district is near 35 m·s^-1, and the wind direction rotation is over 180°; the maximum 10-minute average wind speed in periphery district is near 30 m·s^-1, and the wind direction around has rotated by 73°. Wind shear process can be fitted by exponential function and logarithmic function, which both fit well for smooth underlying surface, and the logarithmic function is slightly superior to exponential function.Gust factor decreases with increasing wind speed until the wind speed reaches level 6, and rougher underlying surface leads to bigger gust factor.The relation between wind gust factor and the height can be fitted by exponential function, especially when the surface is smooth.Compared with GB/T 18710—2002 recommended value, the gale shear index calculated over rough underlying surface during typhoon Neasat (2011) is higher than the recommended value, while over the smooth underlying surface it is lower than the recommended value.