Based on the solar radiation observation data in Beijing from 1958 to 2010,the characteristics of solar radiation change for recent 53 years were investigated by using the linear-trend estimate and the Mann-Kendall test. The results showed that the Monthly variation curve of global solar radiation in Beijing is unimodal distribution from 1958 to 2010,and the global solar radiation overally had weakly decreasing tendency over the 53 years at a rate of 235. 0 MJ/m2per 10 years,the obvious decreasing trend app...