Abstract: The waste heat during curing stage was recycled and re-used, which was able to achieve the purpose of emission-reduction and energy-saving, and reduce the cost of baking. The waste heat recycling system of flue gas in tobacco bulk barn was designed and a contrast experiment was carried out for the baking tobacco leaves between the improved bulk curing barn and the conventional bulk curing barn. The results showed that, the system had obvious coal- saving effect, its average coal consumption for 1 kg dry tobacco leaves was 1.015 kg, being 0.362 kg and 26.29% less than the conventional bulk curing barn, the improved bulk curing barn could save the cost by 0.33 yuan/kg, and its cost-saving rate was 19.88%. In addition, the appearance quality, grade structure and average price of flue-cured tobacco leaves were slightly improved than those of control-cured barn, especially, the quality of tobacco leaves was not affected in the bulk curing-barn.