The effects of 7 parameters including return air temperature in loose resurgence, return air temperature in casing process, moisture content of exports in casing process, tobacco drying steam flow, tobacco drying wall temperature, tobacco drying hot blast temperature and moisture removal suction in tobacco drying during tobacco primary processing on tobacco whole cut rate, broken filament rate, filling power and sensory quality were explored based on orthogonal design method, the optimization of process parameters was done based on intuitive analysis, variance analysis and comprehensive balance method. Results showed that ① return air temperature in loose resurgence had significant effect on broken filament rate, filling power and sensory quality; return air temperature in casing process only had significant effect on filling power; moisture content of exports in casing process had little effect on tobacco whole cut rate, broken filament rate and tobacco filling power; steam flow, wall temperature, hot blast temperature and moisture removal suction in cut tobacco drying process influenced tobacco whole cut rate, broken filament rate, tobacco filling power and sensory quality; ② during the range of experiment, the optimum combination of tobacco primary processing parameter is as follows: return air temperature of 57 ℃ for loose resurgence; return air temperature of 52 ℃ and exports moisture content of 19.5% in casing process; steam flow of 700 kg/h, wall temperature of 132 ℃, hot blast temperature of 115 ℃ and moisture removal suction of –18 μbar in cut tobacco drying process. It is proved that whole cut rate, filling power and sensory quality score were increased by 3.84%, 0.44 cm3/g and 5.1, respectively and rate of broken filament was decreased by 0.23%. Therefore, the optimized silk process parameters could improve the cut tobacco quality effectively.