Rescue detection equipment and detection method based on current injection

The invention discloses a rescue detection device and method based on current injection, and solves the technical problems that the detection precision of a detection device is low, and the distance and azimuth information of an accident well is difficult to accurately detect. The device comprises an excitation mechanism, an underground electrode, a ground electrode and a detection mechanism, the excitation mechanism, the underground electrode and the ground electrode are connected through wires, and the detection mechanism is connected with the underground electrode through a cable; after the excitation mechanism applies current to the underground electrode, the current diffuses to the stratum, one part of the current is upwards transmitted to the ground electrode through a casing pipe of the accident well and enables the excitation mechanism, the underground electrode and the ground electrode to form a closed loop, and the other part of the current is downwards transmitted through the casing pipe of the acc