NOVELTY - Preparation of strontium titanate mesoporous sphere comprises dissolving tetrabutyl titanate in ethylene glycol monomethyl ether, adding ammonia, filtering, and cleaning with deionized water to obtain a titanium hydroxide precipitate; dissolving strontium nitrate in deionized water to form a strontium nitrate solution; and reacting the titanium hydroxide precipitate, strontium nitrate solution, potassium hydroxide, and sodium metasilicate for 1-24 hours at 80-240 degrees C, cooling, filtering, cleaning with nitric acid, deionized water, and anhydrous ethanol, and drying at 60-80 degrees C.    USE - Method for the preparation of a strontium titanate mesoporous sphere (claimed) used for a micro-electronic element, catalyst, solar battery, sensor, and luminous material.    ADVANTAGE - The method is simple, achieves easy control of diameter and specific surface area, has no pollution, and is inexpensive. The sphere has good dispersity of powder granule and large specific surface area.    DETAILED DESCRIPTION - Preparation of strontium titanate mesoporous sphere comprises:    (A) dissolving tetrabutyl titanate in ethylene glycol monomethyl ether, regulating molar concentration of titanium ion at 0.1-0.5 mol/L, adding 1-3 mL ammonia while stirring, standing to precipitate, filtering, and cleaning with deionized water to obtain a titanium hydroxide precipitate;    (B) dissolving strontium nitrate in deionized water to form a strontium nitrate solution, and regulating the molar concentration of strontium ion at 0.2-1 mol/L;    (C) adding the titanium hydroxide precipitate, strontium nitrate solution, potassium hydroxide, and sodium metasilicate to a tank of a reaction kettle, regulating volume of the mixed solution in the tank to 70-90% of the reaction kettle, and stirring for greater than or equal to 10 minutes, where the molar concentration of the strontium titanate based on the titanium and strontium is 0.05-0.25 mol/L, molar ratio of the strontium ion to titanium is 1, the mass concentration of the sodium metasilicate is 2.5-25 g/L and molar concentration of the potassium hydroxide based on the volume of the raw materials in the tank of the reaction kettle; and    (D) sealing the tank, reacting for 1-24 hours at 80-240 degrees C, cooling to room temperature, taking out the reaction product, filtering, cleaning with 0.5 wt.% nitric acid, deionized water, and anhydrous ethanol, and drying at 60-80 degrees C.    The reaction kettle is provided with a PTFE tank and stainless steel covering.