Abstract: In the case of sunshine hours of Pingding of Shanxi Province decreased abnormaly in recent years,the data of 3 meteorological observation was used to analyze the differences of influence of urbanization development on sunshine hours in Yangquan from the meteorological factors and social development factors affecting sunshine hours.The reasons for decrease abnormaly of sunshine hours in Pingding was found out.The results showed that sunshine hours was correlated best with haze days among related meteorological elements such as haze days,total cloud cover,precipitation and relative humidity in Pingding.Sunshine hours significantly negative correlated with haze days and reduced greatly accompanied with a increase of haze days by a big margin in Pingding and Yangquan.The major urban development factors significantly positive correlated with haze days and negative with sunshine hours in Yangquan and Pingding.Urbanization development could increase the atmospheric pollutants,increase haze days,decrease atmospheric transparency and reduce sunshine hours in Yangquan and Pingding.Urbanization development impact on sunshine hours related to the atmospheric pollution diffusion conditions formed by geography and topography.Sunshine hours decreased abnormaly in Pingding was caused by rapid development urbanization and the intermountain basin terrain.