中文摘要：

以2014年中国161个监测城市的S02逐日资料为依据，以ArcGIS和SPSS为工具，以空间插值分析和相关分析的方法，对全国S02污染的时间和区域特征分布及其原因进行研究分析。研究结果表明：2014年全国城市S02年均浓度范围在2．158-117．892μg／m^3，平均年均值为34．253μg／m3。S02污染分布的时间和区域分布特征较为明显，时间上主要表现为冬高夏低，采暖期明显高于非采暖期；区域分布为北方地区高于南方地区，华北、华东和东北区域高于其他区域，尤其是山东省、河北省、山西省、辽宁中南部城市群以及宁蒙沿黄地带最为严重。造成该分布特征的原因主要分为人类活动（工业污染和生活污染）和自然因素（气象及地形条件）2大类，并分别对污染严重的典型区域进行了具体研究分析。

英文摘要：

Based on the database of daily monitoring data of SO2 collected in 161 cities of China during 2016, this paper analyzed the regional and temporal distribution characteristics and causes of SO2 pollution by using ArcGIS and SPSS with spatial interpolation and correlation methods. The analysis suggested that the concentration of SO2 ranged from 2.158 to 117.892 μg/m^3 and yearly average concentration was 34.253 μg/m^3; the SO2 pollution in China was characterized by temporal and regional distribution： SO2 pollution during winter and the heating period was more serious than that in summer, the north more serious than in the south, especially in Shandong, Hebei, Shanxi and Liaoning provinces as well as the region along the Yellow River in Ningxia and Inner Mongolia, and typical cases of the above heavy polluted areas were then analyzed. In conclusion, regional distribution of SO2 pollution was mainly decided by the strength of human activities （industrial pollution and domestic pollution） and natural factors （weather and terrain conditions）.