The invention provides a tobacco moisture retention performance test method which comprises the steps of sample preprocessing, sample weight dynamic testing and data acquisition, dry base moisture rate calculation and moisture loss curve drawing, moisture ratio calculation and data fitting, and calculation of the moisture retention index and the average moisture loss rate or calculation of the average moisture loss rate at specific moisture ratio and the moisture retention index. The invention provides the tobacco moisture retention performance test and evaluation method which is used for solving the problems in the prior art that the tobacco shred moisture retention performance cannot be rapidly, simply, accurately and comprehensively tested and evaluated. Based on a fact that the tobacco physical moisture retention performance has relatively strong correlation with thermodynamics and kinetics indexes, the moisture retention evaluation method takes thermodynamic and kinetic indexes into account simultaneously, so that the tobacco physical moisture retention performance is more comprehensively and scientifically evaluated.