Abstract: Using the data of 3 solar radiation stations and 19 meteorological stations during 1961-2020 in the Hexi Corridor,the total solar radiation of each station was calculated,the spatial distribution and temporal variation characteristics of the total solar radiation in this area were obtained,and the climate influencing factors of the total solar radiation were analyzed by correlation coefficient method.The results showed that:（1）The spatial distribution of total solar radiation decreased from northwest to southeast in time scales of annual,spring,summer and autumn,but increased from northwest to southeast in winter.（2）The solar radiation was unimodal in interlunar and seasonal distribution,with the strongest in May,weakest in December,strongest in summer and weakest in winter.（3）The annual solar radiation had an increasing trend,and its linear trendency rate was 6.3MJ/（m~2·10 a）,among which the total radiation in summer,autumn and winter showed a decreasing trend,the most obvious decreasing trend was in summer,but showed an obvious increasing trend in spring.（4）The total radiation of year and quarter both showed a short cycle of 2-3,5-6 a and 8-10 a long cycle shock.（5）The solar radiation was negatively correlated with relative humidity,precipitation,total cloud cover,low cloud cover and the days of floating dust,flying sand and sandstorm,but positively correlated with temperature and hours of sunshine.（6）The abundance and stability of solar energy resources were consistent,both showed a decreasing trend from northwest to southeast,and the stability of relatively rich areas was also relatively high.