Taking a petrochemical corporation with 180 million tons of gasoline in Nation standard V quality upgrade project in northwestern China as an example,the paper forecasted and analyzed the atmospheric pollution diffusion characteristics of project operation period of heating furnace flue gas SO2,respectively,under the condition of simple terrain,90 m × 90 m resolution and 30 m × 30 m resolution. The correlation analysis of the monitoring data during the project operating period was carried out in three diffe...