Abstract: New unique modifiers of self-made hydroxyl acrylic resin (emulsion) and isocyanato- terminal waterborne polyurethane were developed. The modification effect of the new modifiers to urea-formaldehyde resin was studied and compared with traditional modification method. The research showed that while the molar ratio of urea/formaldehyde was increased in the traditional modification method, the content of free formaldehyde was decreased, but the adhesion strength was reduced. However, the content of free formaldehyde was decreased while adhesion strength and water resistance were increased obviously when the new modifiers were used. The higher the content of the modifiers, the stronger the modification effect. The waterborne polyurethane showed better improvement of the adhesion strength of UF resin, but not so good to water resistance. The modified effect of the high hydroxyl content acrylic resin was stronger than the low hydroxyl content acrylic resin.