The utility model relates to an appurtenance is used in the engineering installation, in particular to an embrace pole for changing iron tower owner material, including an at least supporting leg, the supporting leg includes that two at least spinal branchs prop a section section, the supporting leg top be provided with be used for with by supporting member complex clamping part, be provided with at least one adjustment Assembly who is used for adjusting supporting leg length on the supporting leg, adjustment Assembly sets up and props between section in two adjacent spinal branchs, adjustment Assembly is used for adjusting the axial length of supporting leg, adjustment Assembly includes along the lead screw of supporting leg axial direction setting, the lead screw both ends with supporting leg detachable connects, rotates the lead screw, and the lead screw is along the entering of supporting leg axial or stretch out the supporting leg, and then changes the whole length of supporting leg, realizes that the structure is simpler to the adjustment of supporting leg length, and it is more convenient to adjust, and supported effects is also better.