The wind field characteristics under strong typhoon and designed wind load parameters of transmission line are of great significance for improving the wind resistance design level. Thus

based on the actual measurement of strong wind of typhoon Mekkhala

this paper researches on the probability distribution characteristics and values of basic wind field parameters including typhoon average wind speed and turbulence intensity

and comparatively analyzes the differences in span reduction factor

gust response coefficient

and characteristic values of wind loads from different standard systems in the cases of typhoon with wind speed larger than 30 m/s. Results show that the designed wind load parameters

such as turbulence intensity

peak factor and gust response coefficient

conform to the generalized extreme probability model.The measured value of turbulence intensity is higher than that of the standard DL/T 5551—2018 with open landform

averagely 15% higher when the average wind speed is above 40 m/s.With the average wind speed increasing

span reduction coefficient and gust response coefficient calculated based on the measured data discretely decreases.The calculated values from measured wind speed above30 m/s match those obtained by DL/T 5551—2018

which are much lower than the values of IEC 60826—2017 and ASCE No.74—2020.For characteristic values of wind loads

the measured results of maximum wind speed are enveloped by DL/T5551—2018

but 40% lower than those obtained by IEC 60826—2017 and ASCE No.74—2020.