Abstract: Aiming at the flue-curing barn status quo in Guizhou tobacco growing area, the experiment on rebuilding the traditional flue-curing barn into bulk curing barn was conducted.Maintaining the main structure and draft system of original down draught barn, two single phase axial flow fans, a set of automatic temperature and humidity control system were installed, the stove and flue area were enlarged, and a partition was erected.The rebuilt barn features forced hot air circulation and automatic temperature and humidity control, each barn can accomodate 2000-2300kg of green leaf, the loading density reaches 54.13-70.38 kg/m³.