Abstract: Isobornyl methacrylate(IBOMA) and butyl acrylate(BA) were blended with waterborne polyurethane(WPU), by which these monomers(IBOMA/BA) copolymerized in waterborne polyurethane irradiated by UV light forming a series of IBOMA and BA modified waterborne polyurethane(IMAWPU) films. With the same approach, IMAWPU-0, IMAWPU-1, IMAWPU-2, IMAWPU-3 were prepared with the amount of IBOMA of 0, 1%, 2% and 4%, respectively. The structure of the cured waterborne polyurethane(WPU and IMAWPU) was characterized by FT-IR, and the morphology and performance of the waterborne polyurethane were analyzed. The results of FT-IR, SEM, AFM, and DSC showed that IBOMA and BA were copolymerized in waterborne polyurethane. With the increase of IBOMA content, the surface roughness, initial decomposition temperature as well as the thermal stability, and glass transition temperature of waterborne polyurethane increased. The initial decomposition temperature increased from 185℃ to 195℃. The performance research showed that with the increase of IBOMA content, the crosslinking density and tensile strength of waterborne polyurethane increased gradually, and the performance of IMAWPU-2 was better. Compared IMAWPU-2 with pure WPU, the tensile strength increased from 0.9 MPa to 9.3 MPa, the water absorption decreased from 178% to 31%, the pencil hardness increased from 2B to 2H, and the crosslinking density increased from 0.058 mmol/cm³ to 6.36 mmol/cm³.