Abstract: In this paper, the change of annual sunshine duration in Hebei Provinc during the period of 1961-2010 was analyzed using EOF, maximum entropy spectrum and Lepage test. The results showed that the difference of spatial distribution of annual sunshine duration was significant in the province. Holistically, annual sunshine duration was decreased from the north to the south of the province, it was in a downtrend in most areas of the province, the downtrend was more obvious in most parts of the central-southern area than that in most parts of the northern area, and the downtrend of annual sunshine duration was extremely significant. The spatial distribution of annual sunshine duration was not only similar, but also varied from the south to the north. Temporally, the decrease of annual, seasonal and monthly sunshine duration was extremely significant except that in few months. Lepage test revealed that there was a sharp change of annual sunshine duration in 1972 and 2001. The analyzed results also showed that the there was a significant change and 4.2year periodicity of annual sunshine duration in the province. The further analyzed results revealed that the main factors resulting in the reduction of annual sunshine duration was cloud cover and fog, and floating dust was not the main reason causing the reduction of annual sunshine duration.