Abstract: The pyrolysis characteristic study of carbohydrate compound such as glucose, fructose and sucrose at different temperatures was performed under anaerobic conditions. GC/MS was used for the quantitative and semi-quantitative analysis of the pyrolysis products. The relationships between some products and pyrolysis temperatures were discussed. The result indicates that the component is complex with the increase of temperature, the percentage content of organic acid produced by sucrose is higher than that produced by glucose and fructose when the temperature is below 600 ℃ ; the benzenoid compound is formed at the temperature of 700℃ ,its content is increased with temperature, the percentage content of organic acid produced by glucose and fructose is insignificantly higher than that produced by sucrose; the percentage of furfuryl compounds produced by fructose is higher than that produced by others. These characteristics can be helpful for the future elucidation in the design study of tobacco products.