The invention relates to the technical field of power transmission, in particular to a preformed armor rod winding outgoing working platform of a power transmission circuit. The working platform comprises a first horizontal rod, a second horizontal rod, five longitudinal rods, a first front arm rod, a second front arm rod, a first rear arm rod, a second rear arm rod, a first vertical sliding tackle and a second vertical sliding tackle, wherein the first horizontal rod and the second horizontal rod are parallel to each other, the five longitudinal rods are uniformly distributed and fixedly welded, the first front arm rod and the second front arm rod are fixed at the two ends of a first longitudinal rod through arm rod sleeves, the first rear arm rod and the second rear arm rod are fixed at the two ends of a fifth longitudinal rod through the arm rod sleeves, the first vertical sliding tackle is fixed at the upper ends of the front arm rods through a sliding tackle fixing element, and the second vertical sliding tackle is fixed at the upper ends of the rear arm rods through the sliding tackle fixing element. The working platform has the advantages that: 1) the outgoing rack working method is more simple and convenient than the traditional working mode, the physical strength of a worker is saved, the defect processing time is greatly reduced, and the working efficiency is effectively enhanced; and 2) with the adoption of the tool, the stability of the worker on a wire can be improved, so that the process quality of the preformed armor rod winding is obviously improved compared with the traditional mode.