Abstract: In order to investigate the influences of casing parameters in redrying process on the quality of tobacco strips, the effects of casing rate and steam valve opening on the physical indices and sensory quality of tobacco strips were studied by single factor experiment and validated. The results indicated that:1) The opening of steam valve in casing machine positively correlated to the moisture content and temperature of tobacco strips obviously, while the casing rate did not. 2) The appropriate steam valve opening was between 40% and 60%. 3) The redried tobacco strips had relative consistent moisture content and temperature, insignificant wrinkle and breakage, and its sensory quality was basically unchanged before and after casing.