Abstract: To develop a 2D mathematical model of cigarette smoldering process,the process was simulated with Fluent software,which included water evaporation,tobacco pyrolysis and oxidation reaction,and the transfer of mass,energy and momentum.The temperature distribution at different time and the concentration distribution of O₂,CO,CO₂ and water vapor in the smoke were analyzed.The simulated value of linear burning rate(LBR) of smoldering was of 0.44 cm/minute,the experimental LBR value of 0.38 cm/minute;both the simulated and experimental values of maximum smoldering temperature were in the range of 900-1000 K,which indicated that the simulated values and the experimental values were basically agreed with each other.