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The leaf yellowing stage in tobacco curing reduces the fragrance of the product.To solve this problem,this study introduced the principle and key parameters of a three-stage six-step curing technology.Compared with the traditional three-stage curing technology,the three-stage six-step curing technology produces more suitable ratios of chemical constituents,higher aromatic component content,and higher smoking quality grade of tobacco leaves.The continuous improvement of corollary equipment and matching technologies is expected to widen the applications of the three-stage six-step curing technology in tobacco and provide a strong technical support for the development of the tobacco industry.