The characteristics of sandstorm and sand - blowing climate changes were analyzed by using the 9 meteorological stations'data of sandstorm,sand - blowing and precipitation in Qaidam Basin from March to May over 52 years. Besides,West Pacific subtropical high area index data from 1951 to 2013 was also added,and the statistical method,mutation testing and wavelet analysis were used. The results showed that the sandstorm and sand - blowing of Qaidam over 52 years showed a trend of decline. The average days of sandstorm were the highest in the 60's,and in70's,80's, 's and 90's gradually reduced,but the first decade had been picked up. The sand - blowing days were more in the 70's than 60's. They all had 5 years and 7 years of negative short cycle. After 1992,the number of sand dust storms in the Qaidam Basin was significantly reduced,and same for sand - blowing after 2002. The wind days,sunshine hours and sand dust storms,blowing sand day number had good positive correlations,while the temperature and precipitation had a good negative correlation.