The utility model relates to a measure device in electrified conducting wire line footpath, it includes insulation support, insulator spindle, clamping device, rain -proof full skirt cover and a cover, the insulator spindle suit is in insulation support, and clamping device includes clamping device and lower clamping device, going up clamping device and including mount pad and punch holder, lower clamping device is including mount pad and lower plate down, sets up the scale mark on the lateral wall of insulator spindle lower part, the scale interval from the top down of scale mark sets gradually, the utility model discloses a safe insulating type of instrument, but the direct contact high -tension electricity can carry out the wire line with electricity and directly measure, reduce power failure time, improve the power consumption reliability, effectively reduce operating time, improve work efficiency, the practicality is strong, the reliability is high, can or overhaul the in -process and popularize and apply in power production, run unit plant maintenance.