Wind tunnel tests on a aeroelastic model of steel angle transmission tower under typhoon wind field and terrain B wind field were carried out，and then the time series of wind velocity for different height of the transmission tower were simulated by Weighted Amplitude Wave Superposition（WAWS） method and the wind-induced responses were calculated with FEM in time domain. The comparisons of wind-induced response and wind vibration factor between typhoon wind field and terrain B wind field were conducted. The results indicate that the wind-induced acceleration responses enlarge significantly with wind velocity increase，the wind-induced acceleration response under typhoon wind field is more intensive than that under terrain B wind field，and the amplification is up to 20%~30% . The highly weighted wind vibration factor with value of 1.59 under terrain B wind field，and the value of 1.85 under typhoon wind field are found ，the amplification is up to 16% in total. The results from numerical simulation are in good agreement with that from the wind tunnel tests. Therefore，the design of transmission tower in typhoon-prone areas should take the fluctuating wind load magnification effect into consideration.