Abstract: A simulation of atmospheric dispersion of air pollutants in Hainan Province was carried out by employing CALPUFF model， and the atmospheric environmental capacity of SO2 and PM10 was estimated based on the results of model simulation and using multi-objective linear programming optimization． The results indicated that the air pollution in Hainan province was significantly related to the pollution sources outside of Hainan province in spring， autumn and winter，and the pollution source inside of Hainan province in spring and summer had higher contribution than that in autumn and winter． To meet the requirement of ambient air quality standard， the environmental capacities of PM10 and SO2 in major industrial park of Hainan province were only 7. 32 × 104 t and 6. 38 × 104 t， respectively．