The Annual change of atomspheric sulphur dioxide content, which is much higher from middle November to early March than from April to October, and the daily change which is the highest in daybreak and nightfall, are very obvious in Changchun City. There is a close relationship between them. Through correlation analysis, it can be found that atomspheric sulphur dioxide content is negatively correlated with wind speed, ventilation quantity, and cloud amount in the evening, and positively correlated with atmospheric pressure and cloud amount in the morning.