The invention provides snakelike moving chains, walking machine bodies and an electric power system intelligent maintenance robot and belongs to the field of robots. According to the electric power system intelligent maintenance robot, storage batteries are arranged in a machine body A, a machine body B and a machine body C; an air compressor is arranged on the machine body C; a high-pressure gas cylinder is arranged on the machine body B; a pneumatic tool mounting bracket is mounted on the machine body A; a self-closing valve connector is arranged on the pneumatic tool mounting bracket; snakelike moving chains can imitate a snake to do spatial displacement; the snakelike moving chain between every two machine bodies can realize spatial bending; the machine body A is moved through a snakelike moving chain A, then, the machine body B is moved through the snakelike moving chain A and a snakelike moving chain B, and finally, the machine body C is moved through the snakelike moving chain B; accordingly, when the machine bodies walk at the end of a cable or a tower and need to jump over the barriers, the machine body A can be lifted up to jump over the barriers and then put down; then, the machine body B is lifted up to jump over the barriers and then put down in the same way; and finally, the machine body C is lifted up to jump over the barriers and then put down to get over the barriers.