NOVELTY - Anatase titanium oxide powder and active carbon are immersed in sodium hydroxide solution, stirred and ultrasonic chemical reaction is carried out. The obtained solution is added into reactor. The reactor is placed in oven and hydrothermal reaction is carried out. The oven is cooled to room temperature. The obtained product is rinsed using dilute hydrochloric acid or dilute nitric acid and subjected to vacuum extraction. The resultant product is dried, ground, and processed, to obtain active carbon/low-dimensional titanium oxide composite electrode material.    USE - Preparation of active carbon/low-dimensional titanium oxide composite electrode material used for electrode membrane for supercapacitor and lithium ion secondary battery for automobile.    ADVANTAGE - The method economically provides active carbon/low-dimensional titanium oxide composite electrode material having excellent electrochemical performance.    DETAILED DESCRIPTION - Anatase titanium oxide powder (0.1-0.5 g) and active carbon (1.5-2.5 g) are immersed in sodium hydroxide solution (40-70 ml), stirred for 0.5-2 hours and ultrasonic chemical reaction is carried out. The obtained solution (50-100 ml) is added into polytetrafluoroethylene hydrothermal reactor. The reactor is placed in oven at 150-180 degrees C and hydrothermal reaction is carried out for 18-72 hours. The oven is cooled to room temperature. The obtained product is rinsed using dilute hydrochloric acid or dilute nitric acid, until the pH of the solution is neutral or acidic. The obtained product is rinsed using deionized water and anhydrous ethanol and subjected to vacuum extraction. The resultant product is dried at 80 degrees C, ground, screened and processed at 350-500 degrees C under inert gas atmosphere in muffle furnace, to obtain active carbon/low-dimensional titanium oxide composite electrode material. An INDEPENDENT CLAIM is included for electrode membrane, which contains active carbon/low-dimensional titanium oxide composite electrode material, coating conductive carbon black and polyvinylidene fluoride, in mass ratio of 7.5-9:0.5-1.5:0.5-1.