收集京津冀、长三角、珠三角、成渝城市群地区2003~2013年的灰霾日数据，分析典型城市群近十年灰霾分布情况。结果表明，年均灰霾天数成渝地区＞长三角＞京津冀＞珠三角城市群，珠三角地区在2011年取得最高值后开始下降，另三城市群均在2008年附近取得最小值后持续上升。选典型城市群代表城市共计11个，使用2014年6月至2015年5月国家环境保护部监测站点空气质量每日数据，统计分析灰霾日分布特点，评价其污染水平。结果表明，灰霾日分布：京津冀＞长三角＞成渝＞珠三角地区，灰霾多发生在1月，在各季度出现的状况为：冬季＞秋季＞春夏季；其中，以轻微灰霾天气为主，依次在5月、9月、7月最多；重度灰霾较为少见，10月份最为显著；以指数法计算的污染物月均质量浓度二级限值为标准，京津冀PM2.5、PM10、SO2月均浓度均超标严重，其中以PM2.5污染最为显著；PM10月均质量浓度珠三角城市群全年达标；SO2仅京津冀25%不达标；NO2月均浓度四城市群全部达标，月际变化不明显；从季节分布上看，4种污染物质量浓度以夏季最低，SO2污染以冬季最严重，NO2全年四季均达标，以冬季浓度最高。

Based on Data of haze about four typical city clusters in China——Jingjinji City Cluster, Chengyu City Cluster, Yangtze River City Cluster and Pearl River City Cluster collected by literature review corrected by Spatial Interpolation, data analysis showed that there was a significantly decrease in haze days in 2008 and an on-going increase in the decade. The most haze days happened in Chengyu City Cluster, orderly Yangtze River City Cluster, Pearl River City Cluster and Jingjinji City Cluster. Through the air pollutants monitoring data analysis of 11 central cities in typical city clusters of 2014.6~2015.5 obtained from Chinese National Environmental Protection Monitoring Station, the haze distribution over the typical city clusters are characterized. The results indicated that the variation trend of air pollutants was large at different time．Generally speaking，the appearance rate of haze days showed the tendency of Winter＞Autumn and Spring ＞ Summer. The concentrations of air pollutants such as nitrogen dioxide ( NO2) ，inhalable particles ( PM10 and PM2.5) ，and sulfur dioxide( SO2) showed an apparent tendency of Jingjinji City Cluster ＞ Yangtze River City Cluster ＞Chengyu City Cluster ＞ Pearl River City Cluster. PM10 and PM2.5 were the main contributors to the widespread haze weather．