Abstract: The paper proposes a TMY weighting factor adjustment method based on climate resource endowment. Based on the correlation analysis among parameters,dry bulb temperature,relative humidity,sunshine hours and diurnal temperature range are selected as zoning indicators,and the K-means clustering algorithm is used to zone the regional climate of China,and the TMY weighting factors are dynamically adjusted according to the solar and wind resources in the regions where the stations are located. The results show that the adjusted weighting factors are more accurate and better reflect the climate characteristics of the region.