Abstract: In order to manifest lower energy consumption and less labor employment, and provide the theoretical basis for constructing environmentally friendly modern tobacco agriculture, this paper analyzed gas composition of the chimney from a  bulk-curing barn and the dispersion of sulfur dioxide (SO₂) around the workshop cluster using ecom-J2KN flue gas analyzer and air sampler. During curing, the concentrations of carbon dioxide (CO₂) and SO₂ in the chimney were both highest at 38 ℃, while the concentration of nitrogen oxides (NO_x) was highest at 42 ℃. The emission concentration of SO₂ from the chimney was 1327.60-2218.40 mg·m^-3. Average SO₂ emission would decrease by 49.7% through adding 4.0% of a sulfur-fixed agent. The highest concentrations of SO₂ in the surface soil appeared at the yellowing stage. SO₂ concentration in horizontal direction localized at 43-80 m exceeded 0.5 mg·m^-3. The highest concentration of SO₂ (0.57 mg·m^-3) was observed at 50 m. At 50 m in the downstream wind direction of the workshop cluster, SO₂ concentration in vertical direction localized at 0.9-1.8 m exceeded 0.5 mg·m^-3, and the highest concentration of SO₂ in vertical direction was 0.65 mg·m^-3 at 1.6 m. During curing, the average concentration of SO₂ was decreased by 0.43 mg·m^-3 by using the sulfur-fixed agent. The polluted boundary was localized at 120 m in the downstream wind direction of the workshop cluster.