The invention discloses a preparation method of hydrophilic amino silicone oil. The invention is characterized in that the preparation method comprises the following steps: A. the preparation of low-hydrogen silicone oil: siloxane ring body, high-hydrogen silicone oil, blocking agent and acid are mixed for reaction and are cooled, and the pH is adjusted; B. the preparation of epoxy silicone oil: the prepared low-hydrogen silicone oil, alkenyl epoxy compound and catalyst are mixed for reaction and are cooled; and C. the preparation of hydrophilic amino silicone oil: the prepared epoxy silicone oil, organic amine and solvent are mixed for reaction, and the solvent is distilled. The bonding is firmer in the form of a chemical bond when the hydrophilic amino silicone oil prepared by the method reacts with the fabric, and the hydrophilic amino silicone oil is washable, has soft effect of the common amino silicone oil, no yellowing and good smoothness and antistatic property, and can be widely used in fabric finishing.