The utility model discloses an electric wire leakage detection device, including detecting head and control room, the control room tip is equipped with the detection head, control room and the first electric connection of detection, it is equipped with the tiger's mouth to detect head end portion, the tiger's mouth inboard is equipped with detection ring, detect the overhead adjust knob that is equipped with, the control room surface is equipped with display screen, siren and flashing lamp, be equipped with on the control room and hold the groove, it is equipped with control button to hold the inslot, control room back top is equipped with the buckle, the control room tip is equipped with the fixed orifices, be equipped with on the fixed orifices and act as go -between and set up at the lantern ring of tip of acting as go -between. The utility model discloses can be effectual detection electric wire's the electric leakage condition, be convenient for simultaneously show the electric current of electric leakage with the magnitude of voltage, can be timely send out the police dispatch newspaper, moreover through tiger's mouth and adjust knob, the angle of being convenient for adjust detection ring is favorable to for various electric wires detect, moreover through the buckle, act as go -between and the lantern ring, be convenient for carry the device or string put.