The invention relates to a holding rod joint adding device; a power transmission tower comprises a tower body longitudinally arranged, and a cross bar transversely arranged on the tower body; the tower body comprises a frame structure formed through zigzag fastening of multiple main materials, cross materials and inclined materials; and multiple joints are formed on the main materials. The holding rod joint adding device, provided by the invention, has the advantages of simple operation, high working efficiency, saving of energy consumption and reduction of damage of holding rods in the assembly process.