Intelligent searching instrument for low-voltage ground fault point and intelligent searching method

The invention discloses an intelligent searching instrument for a low-voltage ground fault point and an intelligent searching method. A low-frequency alternating voltage which is subjected to direct current inversion is added between an isolated fault line and the ground through a portable field-adjustable alternating-current power supply, a current flow direction of a butt joint position is measured through an insulating rod type wireless alternating-current tong-type ammeter, searching is preformed along the current flow direction of the butt joint position and towards an unknown fault pointstep by step, and the low-voltage ground fault point is found. By the adoption of the method, the alternating-current power supply is adopted for performing field simulation for searching for the fault point, and the adjustable voltage is applied in a constant-current mode, whether the field grounding is at high resistance or low resistance, a test instrument cannot be damaged even if the grounding is not stable, and the