Atmospheric turbulence and atmospheric diffusion on atmospheric environment impact assessment have influence on the job. Only use existing theoretical model to the actual situation and formulation. Therefore, the prediction practical results were biggish error. Starting from the model, this paper discusses related by complex pollutant in topographic influence, atmospheric diffusion regularity in. Through the contrast analysis of 1993 technical guideline and 2008 edition of atmospheric air, in technical guideline for atmospheric diffusion parameters, stability, principle and model, building under complicated topography and the processing, 2008 edition of atmospheric technical guideline of 1993 than the technical guideline for air superiority, advanced. While the future of atmospheric environmental impact assessment work will play a positive role in promoting.