The invention discloses a cut tobacco drying technology method adopting a roller pipe sheet type cut tobacco dryer to reduce NAB release amount of cigarettes. The specific technological parameters are as follows: moisture content of incoming material at an HT inlet: 20%; steam pressure of HT: 0.278 MPa; hot air temperature: 76.1 DEG C; opening degree of a hot air ventilation door and opening degree of a damp-proof ventilation door: 100% and 30% respectively; and rotating speed of a cut tobacco drying cylinder: 13 rmp. The cut tobacco drying technology method has the benefits that the cut tobacco drying procedure is controlled to combine and adjust technological parameters and further reduce the NAB release amount of cigarettes, a new path to reduce coke of cigarettes is explored, and the method is of vital theoretical significance and practical application value; and key parameters in the cut tobacco drying procedure are selected, confirmed and optimized in the production technology range, so that the NAB release amount in main stream smoke of cigarettes is effectively reduced under the premise that stable sensory quality of cigarettes is kept.