The invention discloses an operation platform overhauling power transmission tower pole cross beams. The operation platform comprises a bridge crossing transverse ladder. Two symmetrical hooks are arranged at the left end of the bridge crossing transverse ladder and can be hung on the X-shaped cross beams of a power transmission tower pole. A fastening device movably connected with a power transmission vertical pole is arranged at the right end of the bridge crossing transverse ladder. The operation platform is installed in a folded mode during installation and usage, due to the fact that the joint of the two X-shaped cross beams of the power transmission tower pole is a bevel, the hooks are firmly connected with the bevel of the X-shaped cross beams, the right end of the bridge crossing transverse ladder is movably connected with the power transmission vertical pole on the right side of the X-shaped cross beams, the whole platform is convenient and fast to install and disassemble, aerial work personnel can reach the joint of the cross beams safely and fast and can stand to operate, aerial work time of the work personnel is shortened greatly, and overhauling tools and raw materials can be conveyed upwards very conveniently. The operation platform is installed in the folded mode and convenient to carry and transport, construction safety can be ensured, the labor intensity is lowered, and the labor efficiency is improved.