Via the analysis of the causes of tobacco sleek leaf and its inherent quality, we have examined the relationship of sleek tobacco leaf with different exterior traits to tobacoo leaf quality and its regrlar pattern, and put forward the reasonasle grouping and grading approaches in the actual operation of tobacco sleek leaf ;hence provided valuable reference to cigarette's technological formula and low-quality tobacco leaf's proper uses as well as the practical techniques for production and purchase of tobacco leaf .