The application discloses a method for preparing chitin highly dispersible in aqueous phase and prepared chitin. After chitin is ground, dissolved, modified with glycidol and purified, a final product glycidol chitin is obtained. The glycidol chitin prepared according to this method has good solubility in purified water, and the concentration can reach 100 mg/mL, which is obviously different from common insoluble or poorly soluble chitin derivatives. Glycidol chitin may have a wide range of application prospects in biomedicine, cosmetics, absorbable materials, and other related aspects.