The invention discloses a safety socket supplying electricity after the inquiry of a micro-current circuit and belongs to the field of power. The safety socket comprises a socket body, and a transformer is arranged in the socket body. The safety socket further comprises a micro-current circuit inquiry system which comprises a thyristor, and a relay is connected into the positive electrode of a power supply circuit on the primary side of the transformer. The micro-current circuit inquiry system further comprises an electric signal frequency receiving mechanism which is connected into the positive electrode of the power supply circuit. The micro-current circuit inquiry system further comprises a signal processing system, and the signal input end of the signal processing system is connected with the electric signal frequency mechanism. One control signal output end of the signal processing system is connected with the relay. According to the safety socket supplying electricity after the inquiry of the micro-current circuit, when signals received by the electric signal frequency receiving mechanism do not meet the frequency requirement or the electric signal frequency receiving mechanism cannot receive signals, the signal processing system controls the relay to be in an off state, and therefore the positive electrode is cut off, and the power supply circuit on the primary side of the transformer is in an off state.