Charging power distribution system and method for charging pile and charging pile

The invention provides a charging power distribution system and method for a charging pile and the charging pile. The system comprises at least three power output ports, a plurality of charging modules, a plurality of electric control switches and a control unit, each power output port and each charging module are respectively connected to the annular bus, and the annular bus forms a plurality of main edges by taking the power output ports as boundaries; an electric control switch is arranged on the annular bus between the adjacent charging modules in each main side, and an electric control switch is arranged on the annular bus between the adjacent power output ports and the charging modules in each main side; wherein the annular bus corresponding to the position of each electric control switch is a sub-side; a bridge circuit is arranged between every two adjacent main edges; an electric control switch is arranged on the bridge circuit; and the control unit is electrically connected with each electric control