NOVELTY - Fuel feeding method for direct liquid fuel battery system comprises introducing gas-liquid mixture at an outlet of a negative electrode of galvanic pile to gas-liquid separator via heat exchanger; directly introducing gas-liquid mixture at an outlet of a positive electrode of galvanic pile to gas-liquid separator, where material outlet of gas-liquid separator and connecting pipe at an inlet of positive electrode of the galvanic pile are sequentially provided with a throttling valve and a liquid pump; and introducing fuel in the fuel tank to the positive electrode of galvanic pile.    USE - Fuel feeding method for direct liquid fuel battery system, where fuel is a mixed solution of carbinol, ethanol, ethanediol, propyl alcohol, formic acid, and/or acetic acid (claimed).    ADVANTAGE - The method reduces the utilization of moving component in the system and reduces energy consumption of system. The throttling valve is manufactured and used conveniently and flexibly to be easier for integrating the system and for improving the stability of the system.    DETAILED DESCRIPTION - Fuel feeding method for direct liquid fuel battery system, which comprises battery galvanic pile, heat exchanger, gas-liquid separator, and fuel tank, comprises introducing gas-liquid mixture at an outlet of a negative electrode of the galvanic pile to gas-liquid separator via heat exchanger; directly introducing gas-liquid mixture at an outlet of a positive electrode of the galvanic pile to the gas-liquid separator, where material outlet of gas-liquid separator and connecting pipe at an inlet of positive electrode of the galvanic pile are sequentially provided with a throttling valve and a liquid pump, and a branch is installed between the throttling valve and the liquid pump and connected with fuel tank pipe via an electromagnetic valve; and introducing fuel in the fuel tank to the positive electrode of galvanic pile via the connecting pipe between material outlet of gas-liquid separator and inlet of positive electrode of the galvanic pile, where concentration sensor is mounted at the inlet, and the output signal is processed by a controller to be electrically connected with the electromagnetic valve via a guide wire. The controller comprises single chip, resistor, triode, and relay; or single chip, field-effect tube, and relay. The fuel concentration sensor is connected with the signal of the single chip. The molar concentration of the fuel in the fuel tank is higher than the molar concentration of fuel in the gas-liquid separator. The fuel feeding concentration of positive electrode of galvanic pile of the direct liquid fuel battery system is monitored and controlled by a concentration sensor provided on a feeding pipe. The throttling valve is made of fuel corrosion resistant material.