The invention discloses a high-power chained charging bow which comprises a chain bin, a left supporting chain, a right supporting chain, a supporting chain drive mechanism and charging electrodes. The left supporting chain and the right supporting chain are arranged in the chain bin, the charging electrodes are used for making contact with vehicle roof receiving electrodes, the supporting chain drive mechanism is located in the chain bin and connected with the upper ends of the left supporting chain and the right supporting chain, each of the left supporting chain and the right supporting chain is composed of multiple connected chain shackles, a left driven wheel and a left chain wheel are arranged at the left end of the surface on the inner side of a first hanging board or a second hanging board, a first transmission gear and a second transmission gear are installed at the two ends of the surface on the outer side of the first hanging board or the second hanging board, and a drivinggear and a driven gear are installed on the surface, opposite to the first transmission gear, on the outer side of the first hanging board or the second hanging board. Through fine adjustment of an installation board, the two charging electrodes on the installation board and the receiving electrodes on a vehicle roof can make full and stable contact, certain pressure is kept, and therefore charging efficiency, reliability and stability are guaranteed.