Abstract: In order to make reasonable use of the surplus heat in the course of tobacco curing. Design of bulk curing barn thermal recycling system and application research.The results showed， This system energy conservation effect is obvious, coal saving rate of 27.86 ~ 28.78%, reduce the cuing cost 0.59 ~ 0.61 yuan per kilogram tobacco leaves, enhance the proportion of orange leaves，enhance the proportion of superior tobacco and the average price of the cured leaves increased by 1.6~ 1.8yuan/kg；The oil of cured tobacco leaf increased, enhanced color, the flue-cured tobacco leaves with green and dust sticking and variegation were less；Increase the contents of total sugar, reducing sugar and k/ c l，reduce the content of total nitrogen and cl-，chemical composition tend to coordinate；Improve the aroma quality, reduce the mixed gas，significantly improve the sensory quality.