Abstract: In order to investigate the reasons for low strength of wet base-sheet of paper-making process reconstituted tobacco in drying process, the thermogravimetric properties of wet state wood pulp, tobacco stem, scraps,tobacco dust and base-sheet were analyzed by Thermogravimetry Analysis (TGA) and Dynamic Mechanical Thermal Analysis (DMA). The results showed that:1) According to TGA, the order of dehydration rate were wet tobacco stem > wet wood pulp > wet tobacco dust > wet scraps > wet base-sheet; 2) According to DMA, the peak values of storage modulus and loss modulus of wet wood pulp sheet were far higher than those of the other materials at the heating rate of 5℃/min, which indicated that the addition of wood pulp could improve the inner combining power and mechanical property of base-sheet of reconstituted tobacco.