Waterborne polyurethane prepolymer was synthesized by prepolymer mixing process using isophorone diisocyanate (IPDI), polyester diol Pol-1256, dimethylolpropionic acid (DMPA) as main materials, and then chain extended by laboratory-made chain extender, after that the prepolymer was blocked by hydroxyethyl acrylate (HEA). The UV curable waterborne polyurethane dispersion was obtained after neutralization and emulsification. The structure of the product was identified by FTIR, the rheological properties of the dispersion were characterized by rotational rheometer, the thermal property of the UV cured film was analyzed by TGA and the tensile property was measured by universal testing machine. The result shows that the chain extender conformed to the expected chemical structure and the product was indeed the UV curable waterborne polyurethane; the dispersion displayed shear thinning behavior and belonged to pseudoplastic fluid; the UV cured film showed excellent thermal resistance as well as tensile property.