The invention relates to a mine circuit electrification indication device and an achieving method based on magnetic circuit blocking technology. The mine circuit electrification indication device based on the magnetic circuit blocking technology is characterized in that initiating ends of primary coils of three single-phase transformer are respectively connected with three phase lines of a three-phase alternating current power source, stopping ends of the primary coils of the three single-phase transformers are mutually connected, and a secondary coil of each single-phase transformer is in series connection with a rectifier diode, a light emitting diode, a current-limiting resistor and a voltage stabilizing diode. The achieving method comprises the steps of (a) regulating a doorsill point, namely a setting test value, of low voltage indication through regulating values of V1, V2, V3 of the voltage stabilizing diode, (b) when one phase line is in disconnection, enabling the light emitting diode in a return circuit not to emit light, and (c) indicating whether the distributing circuit is in electrification or not, in default phase or undervoltage through states of the light emitting diode of the secondary return circuit of each single-phase transformer. The mine circuit electrification indication device based on the magnetic circuit blocking technology provides safe and reliable medium-voltage and high-voltage electrification indication in environmental conditions with dust pollution and explosive gas, is accurate in phase sequence indication and has practical and popularized value due to adoption of the magnetic circuit blocking technology.