Abstract: The amount of SO₂ emission reduction closing down small thermal power generating units and increasing sulfur deposition establishment at the coal-fired power plants from 2006 to 2007 in Shanxi province were simulated with ATMOS long distance transmission model. The distributions of the total sulfur deposition and dry/wet sulfur deposition in study areas were analyzed based on the geographic information system (GIS). The effects of SO₂ emission reduction were discussed. The results show that the capacity of thermal power plant increases from 2006 to 2007. However, SO₂ emission and sulfur deposition decreases persistently. It indicates that the effect of SO₂ emission reduction is better.