Abstract: Setting the same parameter value for all pollutants in the assessment model of pollution loss rate of atmospheric quality, and optimizing the parameters of model using genetic algorithms with global optimum, the formulae of pollution loss rate of atmospheric environmental quality and the comprehensive assessment model of atmospheric environmental quality suitable to all atmospheric pollutants were proposed. The comparison has been made to this model with other models of assessment in the cases of atmospheric environmental assessment. It is shown that this method is not only of visual principle and reliable results, but also of easy calculation and good practicality.