Using the WRF/CALPUFF coupled air quality model simulates a serious haze pollution weather to show distribution of PM2.5 concentration in Harbin during October 15 to 24, 2013.It showed that area occurred serious pollutions was located in municipal districts .It has a different degree of pollution in other counties . Weather conditions have an important influence on the smog pollution .During October 20 to 21 , 2013 , with calm wind, high temperature (highest 18℃, lowest 5℃), 98%relative humidity, the mixing layer height was less than 100 m in the night .A series of bad weather conditions cause this serious smog pollution , with air quali-ty level for level 6.The max concentration of PM2.5 was over 1 000 μg/m3 in municipal districts.%采用WRF／CALPUFF耦合模型，对哈尔滨市2013年10月15日～10月24日一次严重雾霾污染天气进行模拟，得到此次雾霾污染PM2．5质量浓度分布特征．模拟结果表明，由于“热岛效应”的存在发生严重污染的区域主要集中于哈尔滨市辖区内，周边区县存在不同程度的污染．气象条件也对本次雾霾现象产生重要影响，10月20日及21日两天，气温偏高（最高18℃，最低5℃）、相对湿度较大（98％）、夜间混合层高度小于100 m，伴随静风天气导致雾霾现象极其严重，空气质量等级为六级，市辖区内PM2．5质量浓度最大值超过1000μg／m3．
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