Abstract: Based on the ultrasonic pulse data of the 1117 typhoon Nesat observed in Xuwen, Guangdong, we analyzed the surface layer turbulence characteristics of its landing using the vector analysis method. Results obtained are as follows: 1) the wind speed versus time curve of the typhoon showed “M” shape distribution. Direction of wind with velocity greater than 17.2 m/s could be altered up to 219° clockwisely. The 10 min maximum velocity was 25.2 m/s and the 0.1 s maximum velocity was 36.2 m/s.2) The average wind attack angle with velocity greater than 17.2 m/s was 0.9°. 3) Turbulence intensity of the samples with velocity greater than 17.2 m/s was 0.14 longitudinally, 0.12 horizontally, and 0.07 vertically, with three-dimensional turbulent intensity ratio being Iu∶Iv∶Iw = 1∶0.86∶0.5. 4) u, v, w three-dimensional turbulence integral scale of the strong wind with velocity greater than 17.2 m/s was 132 m, 51 m, 28 m, respectively. 5) the turbulence spectrum samples of the strong wind before and after typhoon crossing, and the weak wind in the typhoon center, did not meet the -5/3 law and the assumption of isotropy.