TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Claimed): Preparation of (I) comprises (a) adding a mixed solvent of dioxane and alkoxysilane monomer into a reactor and then mixing with solvent and stirring, slowly adding a certain amount of catalyst A into a system and then mixing with 0.1-5 mass% of aqueous solution and then condensing into water at 80 degrees C for 2-8 hours, (b) adding the condensed mixture into the reactor and then washing with water, drying and filtering to obtain silicone oligomer solution and then adding into boric acid ester monomer and 0.1-2 mass% of catalyst B into the system and then reacting at 65-100 degrees C for 2-6 hours, adding terminal blocking agent to silane monomer and then reacting for 2-4 hours, and (c) washing the reacted mixture with water and then drying, placing the dried mixture to magnesium and then filtering, collecting the filtrate and then distilling at 80-130 degrees C, and removing solvent and volatile components in the system. Preferred Components: The mixed solvent includes benzene-acetone, toluene-acetone, xylene-acetone, hexane or cyclohexane-acetone. The catalyst A is alkali or acid. The acid catalyst is organic acid or inorganic acid. The alkali catalyst is inorganic or organic base. The catalyst B is inorganic alkali or organic alkali. The organic acid is formic acid or acetic acid. The inorganic acid is hydrochloric acid or sulfuric acid. The inorganic base is potassium hydroxide, sodium hydroxide or lithium hydroxide. The organic base is pyridine or triethylamine. The catalyst A is hydrochloric acid or sodium hydroxide. The catalyst B is potassium hydroxide. The molar ratio of the: dioxane and alkoxysilane monomer is 0.5-3:1; and boric acid ester monomer and alkoxysilane monomer is 0.01-0.3:1. The alkoxysilane monomer is gamma -glycidoxypropyltrimethoxysilane, beta-(3 4-epoxycyclohexyl)ethyltrimethoxysilane, beta-(3,4-epoxycyclohexyl)ethyltriethoxysilane, gamma-methacryloxypropyltrimethoxysilane, gamma -methacryloxypropyltrimethoxysilane, methyl phenyl dimethoxysilane, diphenyldimethoxysilane, methyl phenyl diethoxy silane or diethoxy(diphenyl)silane. The terminal blocking agent is vinyl dimethyl ethoxy silane or dimethyl allyl triethoxysilane. The boric acid ester monomer is trimethyl borate, triethyl borate, tripropyl borate, triisopropyl borate or tributyl borate.