The utility model provides a chuck of an intelligent telescopic high-altitude wiring device. The device comprises a bottom plate, a first moving seat, a second moving seat, a first lead screw assembly, a second lead screw assembly, a clamping assembly and a wiring assembly; the first moving seat is arranged on the bottom plate through a first lead screw assembly; the second moving seat is arrangedon the first moving seat through a second lead screw assembly; a clamping lead screw of the clamping assembly is supported on a second moving seat, the clamping lead screw is divided into two areas with opposite thread directions, and two clamping jaws are matched with threads in the two areas of the clamping lead screw respectively; and a wire chaining head of the wiring assembly is arranged onthe second moving seat. The first lead screw assembly and the second lead screw assembly can realize free movement of the chuck of the intelligent telescopic high-altitude wiring device in two directions. Position alignment between the chuck and the test bus is facilitated, the clamping assembly clamps the test bus, the position of the test bus is fixed, and the wire chaining head of the wiring assembly is used for collecting parameters of the test bus.