The invention discloses a method for discriminating the browning degree of aged tobacco leaves, which is characterized in that a mechanism for discriminating the browning degree of the tobacco leaves is established on the basis of apparent colors, specifically, the grade of the browning degree is preset, and the aged tobacco leaf samples are used for carrying out measurement statistics and comparative analysis on color related indexes, therefore, relatively stable target index data with relatively small mutual influence is obtained, abstract models corresponding to browning degree grades are constructed by using the target index data, and finally, the quantitative browning degree of the tobacco leaves to be detected represented by color values or browning area ratios can be judged in combination with the target indexes of the tobacco leaves to be detected and the abstract models. Compared with sensory analysis, the method has the advantage that the browning degree of the aged tobacco leaves can be quantitatively judged more visually, quickly and accurately.