Facing the global warming and environmental issues,the carbon footprint calculation should be extended to the whole supply chain in order to accurately calculate greenhouse gas emissions on every operative activity,and reduce their carbon emissions.Based on the theory of supply chain management and meteorology,and considering carbon footprint gas diffusion characteristics,this paper focuses on a kind of calculation method of carbon footprint.The research establishes the carbon footprint calculation model of fixed emission sources and dynamic emission sources of supply chain using the Gaussian and Lagrangian K model,respectively.A simplified numerical example of textile and apparel supply chain validates and illustrates the proposed approach.Thus,the supply chain enterprise individual activities are elaborated,the carbon footprint calculation of a single process,can more refine to measure carbon emissions.The result can be helpful to make a reasonable low carbon supply chain management strategy.