The invention relates to a power transmission tower cumulative damage fault probability calculation method under typhoon path prediction information. The method comprises the following steps: firstly,determining a risk tower influenced by typhoon through grid division; according to the short-term and short-term typhoon prediction path characteristics, respectively determining the action time andwind speed of the typhoon on the risk pole tower; then constructing a low-cycle fatigue damage model of the tower in unit time; and finally determining the tower fault probability under the action oftime accumulation. According to the method, the short-term and short-time typhoon forecasting information of the meteorological department and the geographic position information of the power transmission tower are combined, the strong correlation factors of tower falling under the typhoon environment are fully considered, and certain effectiveness and reasonability are achieved.