NOVELTY - Preparing scutellarin using baicalin comprises taking Scutellaria baicalensis and buffer solution, adding quartz sand, grinding, centrifuging to obtain crude enzyme solution, filtering, dialyzing, vacuum freeze drying to obtain crude enzyme powder; taking baicalin, dissolving using eutectic solvent, adding crude enzyme powder into buffer solution, mixing, incubating, stirring, cooling, filtering, recovering precipitate, dissolving precipitate in ethanol, filtering, adding deionized water, stirring, precipitating scutellarin to obtain precipitate, filtering and drying.    USE - The method is useful for preparing scutellarin using baicalin (claimed).    ADVANTAGE - The method has simple preparation, low baicalin (90%) conversion rate, utilizes low volatility, safe, non-toxic green solvent, uses baicalin having purity more than 75%, is easy for separating and purifying, safe and environment-friendly.    DETAILED DESCRIPTION - Preparing scutellarin using baicalin comprises (i) taking Scutellaria baicalensis and buffer solution having pH 4-6 in ratio of 1:1.5-2.5, adding quartz sand, grinding, centrifuging to obtain Scutellaria baicalensis crude enzyme solution, filtering the crude enzyme solution, dialyzing, vacuum freeze drying to obtain Scutellaria baicalensis crude enzyme powder; (ii) taking 80% baicalin, melting, dissolving using eutectic solvent, adding Scutellaria baicalensis crude enzyme powder into buffer solution having pH of 4 to 6, mixing uniformly, heating to 40-50 degrees C, incubating, stirring for 2-4 hours, cooling to room temperature, filtering, recovering precipitate (filtrate can be used again for hydrolyzing baicalin), where the mass ratio of baicalin, eutectic solvents, buffer solution and Scutellaria baicalensis crude enzyme powder is 1:40-60:150-250: 0.025-0.1; and (iii) dissolving obtained precipitate with 95% ethanol, filtering, discarding insoluble material; adding 5-6 times of deionized water into filtrate, stirring uniformly, allowing to stand, precipitating scutellarin, filtering to obtain precipitate, washing with deionized water for three times, filtering and drying.