To identify the optimum number and period for removing the field inapplicable fresh leaves, range analysis, variance analysis and comprehensive evaluation way of orthogonal experiment design method were employed to study the influence of different number of the removed field inapplicable fresh leaves and the period of removing on physical properties of upper leaves of flue-cured tobacco. The results showed that the number of the lower leaves removed was the key factor for the degree of leaf opening, thickness of leaf, balance water ratio and weight per unit leaf area of the upper leaves of flu...