Base on quasi-steady theory and Davenport spectrum, wind vibration coefficients of 1 000 kV three-span trussed frame are calculated, which is compared with that calculated by the standard method. It is shown that the wind vibration coefficient of 1 000 kV three-span trussed frame are higher than that of single tower, which calculated by standard method are conservative for edge tower and dangerous for middle tower. The results obtained in the paper need to be given attention to in engineering design.