Abstract: Using the  ten-day sunshine duration data of 107 meteorological stations in Henan Province from 1961 to 2012, spatialtemporal variation characteristics of  ten-day sunshine duration were analyzed, and the scale invariance analysis of  tenday sunshine duration was studied by using the method of detrended fluctuation analysis. The results showed that the means of  tenday sunshine duration and its standardized error among stations were 57.90 and 9.18 h, respectively, and their probability distributions were not subject to normal distribution. The cumulative abnormal of sunshine duration had a distinct linear increasing trend, however, its square deviation among the stations was of phase characteristics. The scale index of  ten-day sunshine of each station was above 0.5, indicated that time series of scale index was of permanence. Variation of scale index among stations was small, which obeyed the normal distribution.