Live-line measurement tool for outer diameter of steel-cored aluminum strand

The invention belongs to the technical field of live-line measurement, and particularly relates to a steel-cored aluminum strand live-line measurement tool which comprises a tool box body, a movable scale and a limiting bolt, and the tool box body is provided with an insulating pull rod fixing part; the tool box body is further provided with a measuring groove position, the measuring groove position is divided into an upper cavity part and a lower clamping groove part, the clamping groove position is designed in a step shape, and a plurality of clamping grooves are formed, and the calibers of the clamping grooves are sequentially narrowed from the outer side to the inner side. The movable scale is arranged at the upper cavity part and comprises two clamping jaws which are oppositely arranged; the limiting bolts are designed in pairs, the head end of each limiting bolt penetrates through the tool box body and is connected with the corresponding clamping jaw bolt, and the tail end of each limiting bolt is provi