In view of high energy consumption, high baking cost and serious pollution emission during the baking process of tobacco leaves, thermogravimetric analysis is used to investigate the combustion characteristics of coal, tobacco straw and cinder. Analyzed TG-DTG characteristics of samples with different blending ratios and based on the ignition temperature and burnout temperature, then the combustion characteristics of the samples are obtained. Compared with the individual combustion of coal, blending ratio of the optimal positive effect is obtained. It illustrates that different blending ratios of coal, tobacco straw and cinder result in different effects between promotion and inhibition. Tobacco straw is beneficial to burn on fire but adverse to keep combustion of fixed carbon. Compared with the TG and DTG characteristics in different blending ratios of coal, tobacco straw and corresponding combustion characteristics parameter, it is found that the best blending ratio of tobacco straw is 40%. According to the TG and DTG characteristics of different blending ratios of coal, cinder and corresponding combustion characteristics parameter, it shows that the more blending ratio of cinder, the more adverse effect to fixed carbon burning. The composite fuel with 40% tobacco straw, 10% coal cinder and 50% coal has two obvious advantages.On the one hand,it can maintain quickly burning and the volatile combustion of the tobacco straw at low temperature stage .On the another hand, it can keep continuous combustion of the fixed carbon in coal at high temperature stage.