Polysiloxane acrylate oligomer (PSAE), which possesses UV-curing capability and release property, was synthesized by hydrosilyation reaction of polyhydrosiloxane with allyl methylacrylate. The effects of reaction temperature, catalyst concentration and solvent on the reaction were studied. It was found that the optimum synthesis temperature for PSAE was 60—70℃. Tris (Triphenylphosphine) rhodium chloride was used as catalyst with 0.04% of total amount of reactants. Structure of the oligomer was characterized by FTIR. Photosensitive and surface properties of as-synthesized PSAE were investigated. The photosensitivity of PSAE is 56.9mJ/cm,2,. UV–cured film of PSAE possesses lower surface energy with ,γ,d,S, (H,2,O) of 32.49mN/m.