The water- based acrylic resin emulsion without crosslingking agent was prepared by mixing low glass transition temperature, high molecular weight acrylic resin emulsion and high glass transition temperature, low molecular weight acrylic resin aqueous dispersion, which was used for thermal lamination process of color printing packaging paper with plastic film. Using acrylic acid, butyl acrylate, styrene and hydroxyethyl acrylate as main raw materials, the acrylic emulsion with the molecular weight of (1.48~1.84) × 10⁵ and glass transition temperature (T_g) of －20 ~ －40 ℃ was synthesized by seeding emulsion polymerization. The solid resin with molecular weight of (1.34~1.65)×10⁴, T_g of 20~45 ℃, softening point (SP) of 80~105 ℃ was synthesized by bulk polymerization using acrylic acid, butyl acrylate, styrene, α-methylstyrene and maleate monoester. Furthermore, a self- emulsifying method was employed to prepare the aqueous dispersion of the solid resin. Properties of the acrylic emulsion with different T_g and the aqueous dispersions were investigated. The results show that when the acrylate emulsion(T_g of －27.6 ℃) was mixed with the solid resin dispersion(T_g of 28.2 ℃) at a mass ratio of 8:2, it could be used for thermal lamination of PET film and black printing paper. The peel strength reaches 5.6 N/25 mm, and the holding power reaches 270 h, which can fully meet the performance requirements of embossed laminating materials.