Abstract: Based on the normative up-draft ordinary curing barn(2.7m×2.7m)and the twice weight of the ordinary loading, the trails of several types of air circulation fan, whose power is 750, 550, 370, 250, 150，etc， the inherent and outer quality of flue-cured tobacoo were analyzed.The results showed that axial flow fan with fan flowrate 5600m3/h and power 250W could get good result.