NOVELTY - Preparing high-purity cholesterol comprises (i) adding cholesterol crude product and active carbon in an aqueous solution of organic solvent, (ii) filtering the cholesterol solution, (iii) reducing temperature of the filtrate, blending, separating the crystal, removing the blocks, and freezing the organic solvent aqueous solution for washing, (iv) adding the cholesterol crystal in the organic solvent aqueous solution, (v) performing ultrafiltration on the cholesterol solution via ceramic film, (vi) reducing the temperature of the filtrate, and separating the crystal, and (vii) vacuum drying.    USE - The method is useful for preparing high-purity cholesterol.    ADVANTAGE - The prepared product: has high purity (greater than 95%) and high recovery rate (greater than 85%); is odorless, economical, environmental friendly, simple in preparation, and industrial production; and can be recycled.    DETAILED DESCRIPTION - Preparing high-purity cholesterol, comprises (i) adding cholesterol crude product and activated carbon in the aqueous solution of organic solvent, blending and heating, completely dissolving the cholesterol crude product, condensing the solution and refluxing for 30-60 minutes to obtain cholesterol solution, (ii) filtering the cholesterol solution at constant temperature to obtain the filtrate, (iii) reducing the temperature of the filtrate from 5 to -5 degrees C while blending, blending for 1-2 hours, separating the crystal and pumping together with the filtrate, removing the blocks, and freezing the organic solvent aqueous solution at -18 to -20 degrees C for washing to obtain the cholesterol crystal, (iv) adding the cholesterol crystal in the organic solvent aqueous solution, heating to the boiling state of the organic solvent aqueous solution while blending, dissolving the cholesterol, condensing the solution and refluxing for 30-60 minutes to obtain the cholesterol solution, (v) performing ultrafiltration on the cholesterol solution via ceramic film at constant temperature to obtain the filtrate, (vi) reducing the temperature of the filtrate from 5 to -5 degrees C while blending, blending for 1-2 hours, separating the crystal and pumping together with the filtrate, removing the blocks, freezing the organic solvent aqueous solution at -18 to -20 degrees C for washing to obtain the cholesterol recrystallization product, and (vii) vacuum drying the cholesterol recrystallization product at constant temperature to obtain high-purity cholesterol.