Abstract: A polyurethane (PU) emulsion which was based on toluene diisocyanate (TDI), polyethepolyols, and organic silicon as the main raw material, through prepolyming, extending, modifying, introducing hydrophilic group, neutralizing, and emulsifying process, was prepared. By measuring the emulsion viscosity, surface tension, stability performance in solvent such as water, toluene, and tetrahydrofuran, wash-resistant performance of the membrane, and comparing with the similar imported products, we drew the conclusions that the introduction of silicone can significantly improve the membrane’s heat endurance, wash resistance, stability performance of toluene and tetrahydrofuran compared with similar imported products.