A direct liquid fuel cell power generation device, comprising a direct liquid fuel cell system; the direct liquid fuel cell system comprises a fuel cell stack, an air pump, a gas-liquid separator, a fuel circulating pump and a condenser; a gas outlet of the air pump is connected with a stack cathode inlet pipeline, and a stack cathode outlet is connected with a cathode material recovering port pipeline of the gas-liquid separator through the condenser; a liquid outlet of the gas-liquid separator is connected with a stack anode inlet pipeline through the fuel circulating pump, and a stack anode outlet is connected with an anode material recovering port pipeline on the gas-liquid separator; the gas-liquid separator is provided with a cathode material recovering port, an anode material recovering port, an auxiliary solution inlet and the liquid outlet, characterized in that: the direct liquid fuel cell system also comprises an auxiliary starting power interface and a liquid fuel delivery port; the liquid fuel delivery port is connected with the auxiliary solution inlet of the gas-liquid separator through a liquid fuel communicating tube; the auxiliary starting power interface is connected with an electric heating element wound outside the liquid fuel communicating tube through a conducting wire; the auxiliary starting power interface is connected with the electric heating element arranged on a lower wall surface in an anode material gas-liquid separation chamber through the conducting wire; the power generation device also comprises a low-temperature auxiliary starting component; the low-temperature auxiliary starting component comprises an auxiliary solution storage tank, an electric heater, a solution delivery pump, a low-temperature power supply and an auxiliary power supply plug; the electric heater is arranged on the bottom of the auxiliary solution storage tank to heat a solution in the auxiliary solution storage tank; the low-temperature power supply powers the electric heater, or powers the electric heater and the solution delivery pump at the same time; wherein in a starting phase of the direct liquid fuel cell system, the liquid outlet of the solution delivery pump is configured to be communicated with the liquid fuel delivery port of the direct liquid fuel cell system through the pipeline; a liquid inlet of the solution delivery pump is configured to be connected with the auxiliary solution storage tank through the pipeline; the auxiliary power supply plug is configured to be electrically connected with the auxiliary starting power interface of the direct liquid fuel cell system directly or through a voltage converter to power the electric heating element of the direct liquid fuel cell system in the starting phase, wherein in a storing phase, the liquid outlet tube of solution delivery pump is configured to be connected with the auxiliary solution delivery tube, the liquid inlet tube of the solution delivery pump is configured to be connected with the liquid fuel delivery port of the direct liquid fuel cell system such that liquid fuel in the gas-liquid separator is drained. the direct liquid fuel cell system also comprises an auxiliary starting power interface and a liquid fuel delivery port; the liquid fuel delivery port is connected with the auxiliary solution inlet of the gas-liquid separator through a liquid fuel communicating tube; the auxiliary starting power interface is connected with an electric heating element wound outside the liquid fuel communicating tube through a conducting wire; the auxiliary starting power interface is connected with the electric heating element arranged on a lower wall surface in an anode material gas-liquid separation chamber through the conducting wire; the power generation device also comprises a low-temperature auxiliary starting component; the low-temperature auxiliary starting component comprises an auxiliary solution storage tank, an electric heater, a solution delivery pump, a low-temperature power supply and an auxiliary power supply plug; the electric heater is arranged on the bottom of the auxiliary solution storage tank to heat a solution in the auxiliary solution storage tank; the low-temperature power supply powers the electric heater, or powers the electric heater and the solution delivery pump at the same time; wherein in a starting phase of the direct liquid fuel cell system, the liquid outlet of the solution delivery pump is configured to be communicated with the liquid fuel delivery port of the direct liquid fuel cell system through the pipeline; a liquid inlet of the solution delivery pump is configured to be connected with the auxiliary solution storage tank through the pipeline; the auxiliary power supply plug is configured to be electrically connected with the auxiliary starting power interface of the direct liquid fuel cell system directly or through a voltage converter to power the electric heating element of the direct liquid fuel cell system in the starting phase, wherein in a storing phase, the liquid outlet tube of solution delivery pump is configured to be connected with the auxiliary solution delivery tube, the liquid inlet tube of the solution delivery pump is configured to be connected with the liquid fuel delivery port of the direct liquid fuel cell system such that liquid fuel in the gas-liquid separator is drained.