The invention relates to an automatic power supply system circuit for emergency security safeguard power generation. The circuit comprises a power supply circuit check circuit, a storage battery voltage check circuit, a circuit for charging to a storage battery by a diesel three-phase alternator, a circuit for charging to the storage battery by a wind driven generator, a circuit for charging to the storage battery by a solar cell panel, a circuit for supplying power to a power supply circuit by the storage battery, and a circuit for charging to the storage battery by a fuel cell generator. With the adoption of the circuit disclosed by the invention, the power supply of a plurality of power supply units can be realized, and power supply schemes are adjusted according to various special environments and actual conditions, thus guaranteeing anytime and real-time power supply for the power supply circuit in case of the need of power supply.