Abstract: The solar radiation data from 1960 to 2005 in Changchun weather station and Yanji weather station in Jilin province were analyzed by linear regression analysis, linear correlation analysis and Mann-Kendall test in order to reveal the variation of solar energy resources. The results indicate that the mean annual solar radiation in Jilin province is 4787.4 MJ/㎡•a. The solar radiation is strong in summer, followed in spring and winter. The mean annual solar radiation is fluctuant and has a decreasing trend, while the trend is not obvious. The solar radiation is higher in 1960s and is lower in 1980s, and returns to the normal in 1990s. The solar radiation decreases in spring, autumn and winter, especially in winter, while it increases in summer. The spatial distribution of annual sunshine duration decreases from the west to the east, and its temporal distribution decreases from spring to winter. In generally, total solar energy resources are rich and the change trend is not significant, which is benefit for the utilization of the solar energy resources in Jilin province.