The invention discloses a tunnel internal induction power-drawing apparatus. The apparatus comprises an induction power-drawing module, a variable
resistor, a fixed
resistor, a rectification circuit, a
transformer discharge circuit, a
resistor discharge circuit, a single-pole double-throw switch, a
voltage stabilizing circuit, a single-
chip microcomputer and a load, wherein the induction power-drawing module comprises the variable resistor, the fixed resistor, the single-
chip microcomputer, the single-pole double-throw switch and a plurality of circuits; the induction power-drawing module is internally provided with an induction power-drawing portion, the induction power-drawing portion comprises a
bus and a
current transformer, and the
current transformer internally comprises a power-drawing coil; the
current transformer is connected in parallel with the variable resistor and the fixed resistor, and the current
transformer is electrically connected with the rectification circuit; and the
voltage stabilizing circuit is connected in parallel with the load. According to the invention,
electric energy of a high-
voltage line is obtained by use of a non-
contact mode, control is performed by the single-
chip microcomputer, artificial intervention is low, and the apparatus can provide a stable power supply source, prolongs the service life of equipment, is quite low in cost and fully utilizes
electric energy resources.