Disclosed in the utility model is a combined wire bracing plate comprising a fixed structure and a wire bracing structure arranged at the fixed structure. The fixed structure is a hollow structure and the wire bracing structure is formed by integrated casting moulding. The fixed structure includes a horizontal supporting structure along a horizontal direction and a vertical supporting structure along a vertical direction; and a rigid protection connection outer layer is arranged at the outer surface of the fixed structure. According to the combined wire bracing plate, the tensile strength, the stability and the reliability are high; the structure is simple and light; the plate can be processed easily; the manufacturing cost is low; and convenient transport and installation can be realized. The labor force can be freed and the work efficiency is also enhanced; and the time schedule of work is accelerated. In addition, the recovery becomes convenient and thus the construction cost is lowered, thereby saving the economic cost; a problem of temporary bracing wire erecting during the high-voltage transmission line construction can be solved and the work efficiency is improved and the construction security is guaranteed.