By using the observation data of 43 meteorological stations in Qinghai Province in 19612015 years,and the wind erosion climate factor index formula given by Food and Agricultural Organization of the United Nations,the wind erosion climate factor index and the number of wind days in the 4 different ecological functional regions of Qinghai in winter and spring were calculated and counted.Based on the above analysis, the basic characteristics of the wind erosion climatic erosivity and the number of wind days were discussed.The results showed that the wind erosion climate factor index and the number of wind days in winter and spring in the 4 different ecological functional regions of Qinghai presented the significant decreasing trend,and the spatial distribution characteristics of the wind erosion climate factor index and the number of wind days were all the same,showing the decreasing distribution from the west to the east.It was divided into the eastern and western areas by taking the Dachaidan,Golmud,Qumalai and Zaduo as the boundary. The C value and the number of wind days in the eastern region were mostly below 40 dand 10 d,respectively, and decreased from Nuomuhong,Tianjun and Gangcha to the south and the north;the Cvalue and the number of wind days in the western region were greater than 40 dand 10 d,respectively,and gradually decreased from the west to the east.The mutations of the wind erosion climate factor index and the number of wind days in winter and spring occurred in 1992 and 1997,respectively,and entered a significant downward trend in 1995 and 1999,respectively.The meteorological factors affecting the wind erosion climate factor index in winter and spring in the 4 different ecological functional regions of Qinghai were different,and the influence degree of the same influence factors in different regions was also different.It was mainly controlled by wind speed in arid Qaidam Basin,affected by wind speed and precipitation in the eastern agricultural area and the Qinghai Lake area,and affected by wind speed,temperature and precipitation in the Three-River headwater area and the whole province.The development of climate warm and humidification, the slow rise of vegetation cover and the significant decreasing trend of wind speed in the 4 different ecological functional regions of Qinghai,will provide favorable conditions for controlling the occurrence of wind erosion climate factor index.