Abstract: Based on the inhalable particles data of PM10, PM2.5 and PM1 from August 2006 to October 2007 in Shenyang, Anshan, Fushun and Benxi and the relevant meteorological data, the distributions and pollution characteristics of inhalable particles as well as the relationship with meteorological factors were analyzed. The results show that the changes trends of the daily mean concentration of PM10 and PM2.5 in four cities are similar because they are affected by the regional synoptic system. And these changes are of the regional distribution characteristics. The exceeding standard ratio of PM10 is highest in winter. The ratio of the daily mean concentration of PM2.5 and PM10 is largest in summer and winter. The correlations are better among PM10, PM2.5 and PM1. The relationship between PM10 and wind speed as well as air temperature is negative. PM2.5 and PM1 with visibility, wind speed and air temperature is the negative correlations, while they are the positive correlation with relative humidity.