Abstract: The purpose of this study is to explore the relationship between the color change of the cigar wrap and the internal moisture content during the airing process, and to provide a reference for the precise operation in the air-curing process. Using the middle leaves of Dexue No.1 as the test material, the appearance parameters and water indexes of tobacco leaves during the airing process were determined, and correlation analysis was carried out to establish a regression model and verify it. During the air-drying process, the change trend of the color parameters of the front and back of the tobacco leaves was basically the same, and the main fluctuations were concentrated during the third to eighth days of airing. During the airing process, the moisture content of tobacco leaves decreased gradually, and the main loss was free water at the early stage, then bound water. Correlation analysis showed that the correlation between the water indexes and the color parameters during the airing process was good, and the stepwise regression equation reached a very significant level. Therefore, the correlation between the color characteristic parameters and the moisture content during the airing of the cigar jacket is significant, and the color characteristic parameter can be used as an auxiliary index to judge the moisture content of the tobacco leaf.