Abstract: With SO2, NO2 and PM10 as evaluation factors, by reference to ambient air quality standard, through calculating the weight distribution coefficients and attachment degrees of pollution factors by fuzzy-mathematical method, the total air environmental quality of Huai＇an City in Jiangsu Province was evaluated objectvely. The comprehensive evaluation results showed that the total air environmental quality of Huai＇ an City was light pollution （grade Ⅱ） and its air quality was deteriorating year by year. Compared with general evaluation method, the comprehensive evaluation results got from deduction and calculation by using fuzzy-mathematical concepts were more objective.