Abstract: To avoid segregation and breakage of cut tobacco during pneumatic feeding caused by excessively high air velocity and uncontrollable tobacco velocity, the pneumatic tobacco feeding system was modified via adopting a dune-shaped pneumatic cut tobacco feeding method. This method was based on the control of velocity ratio between cut tobacco and air (△VAT). Septwolves (Red) brand cigarettes were tested in Longyan Tobacco Industrial Limited Corporation at an increased tobacco feeding flow, △VAT was introduced as a control parameter and an automatic anti-blocking module was added. The results showed that: 1) When the pneumatic tobacco feeding velocity was controlled within 7-11 m/s, dune-shaped pneumatic cut tobacco feeding at a lower air velocity was realized and excessive friction between tobacco and feeding pipe was avoided to effectively protect cut tobacco. 2) When the ratio of △VAT was controlled between 0.70 and 0.85, best cut tobacco conveying status was achieved. 3) The modification of pneumatic feeding system realized dune-shaped pneumatic tobacco feeding at a lower air velocity, the air velocity was reduced from uncontrollable to 11.32 m/s, cut tobacco velocity was reduced to 9.5 m/s, and △VAT was 0.84, which effectively prevented tobacco segregation and improved the output quality. 4) After the modification, the blending uniformity of cut tobacco decreased from 5.41 to 5.16; meanwhile the reduction of air velocity effectively decreased tobacco consumption. The absolute value of reduction of integral strand proportion changed from 1.27% to 0.74%, and the tobacco consumption per 50 000 cigarettes decreased from 32.17 kg to 31.34 kg.