Abstract: Guiling City is one of the national physical scenic spots for sightseeing Its air quality must reach to the first grade of national atmospheric environmental quality standard.From the present air quality of Guiiing City, the paper researches essentially for the dispersion process of pallutants in Guiling karst basin and bases on the present atmospheric quality models to calculate concentration of sulfuric dioxide. According to these, we look for the way to heighten and maintain the present air quality of Guiling City to the first grade of national atmospheric environmental quality standard.