The polyurethane modified fluorinated polyacrylate (PUAF) is obtained with 2-(perfluorohexy) Ethyl Acrylate(C6F) and hydroxypropyl acrylate as polymerization monomers, azobisisobutyronitrile as a radical polymerization initiator, in the polyurethane prepolymer. The structure, film morphology and application performance of PUAF were studied by infrared spectroscopy, nuclear magnetic resonance spectroscopy (1H-NMR) and field spectrum scanning electron microscopy (FE-SEM), etc. PUAF can form dense membrane which is hydrophobic on the surface of fiber.The dried fabric samples was submerged for one time into 1％solution of PUAF in ethyl acetate ,then dried at 180℃during 1.5min.The water contact angle of fabric is133.5 ?