The invention discloses a method for early warning meteorological risk of power transmission line windage yaw flashover faults. In view that strong wind resulting in windage yaw flashover arcing correlates to strong weather processes closely, via analysis on weather processes, the ground, meteorological elements at high altitude and weather indexes before and after the occurrences of historical windage yaw flashover faults, an integrated model of the whole atmosphere associated with the windage yaw flashover faults is proposed. In addition to considering the changes of wind speed itself, changes of the factors, such as temperature and pressure, closely related to strong weather processes and the instruction significance of high altitude weather indexes are also considered in the model. What's more, on this basis, further combining with numerical mode forecast results, the integrated model of the whole atmosphere is adjusted so as to adapt to the numerical mode forecast results. The accuracy in time and in space can also be significantly improved.