A power control method for a charging station, applied to an integrated controller of the charging station, wherein the charging station has an energy storage system and is connected to a power grid system, the power control method comprising: S10: acquiring a power supply capability parameter broadcasted by the energy storage system, a power supply capability parameter broadcasted by the power grid system and a current power demand broadcasted by each target charging device, the target charging device being a charging device having a power output demand in the charging station; S20: calculating a first maximum available power of the charging station based on the power supply capability parameter of the energy storage system and the power supply capability parameter of the power grid system; S30: determining a first power limit of each target charging device based on the first maximum available power of the charging station, the current power demand broadcasted by each target charging device, and a predetermined allocation rule; and S40: broadcasting the first maximum available power of the charging station and the first power limit of each target charging device to each target charging device, so that each target charging device performs power output based on the first power limit, determines whether a sudden drop in a power supply capability occurs based on the received first maximum available power of the charging station, a currently acquired power supply capability parameter broadcasted by the energy storage system, and a currently acquired power supply capability parameter broadcasted by the power grid system, and reduces a power limit of the target charging device to a second power limit when the sudden drop in the power supply capability occurs, to avoid power grid overload of the charging station, characterised in that the first maximum available power is calculated as APmax=GPmax+EPmax-RP where APmax represents the first maximum available power, GPmax represents a maximum available power of the power grid system, EPmax represents a maximum available power of the energy storage system, and RP represents a predetermined reserved power; or the first maximum available power is calculated as APmax=Pc*(GPmax+EPmax), where APmax represents the first maximum available power, GPmax represents a maximum available power of the power grid system, EPmax represents a maximum available power of the energy storage system, and Pc represents a power coefficient, where 0<Pc<1. S10: acquiring a power supply capability parameter broadcasted by the energy storage system, a power supply capability parameter broadcasted by the power grid system and a current power demand broadcasted by each target charging device, the target charging device being a charging device having a power output demand in the charging station; S20: calculating a first maximum available power of the charging station based on the power supply capability parameter of the energy storage system and the power supply capability parameter of the power grid system; S30: determining a first power limit of each target charging device based on the first maximum available power of the charging station, the current power demand broadcasted by each target charging device, and a predetermined allocation rule; and S40: broadcasting the first maximum available power of the charging station and the first power limit of each target charging device to each target charging device, so that each target charging device performs power output based on the first power limit, determines whether a sudden drop in a power supply capability occurs based on the received first maximum available power of the charging station, a currently acquired power supply capability parameter broadcasted by the energy storage system, and a currently acquired power supply capability parameter broadcasted by the power grid system, and reduces a power limit of the target charging device to a second power limit when the sudden drop in the power supply capability occurs, to avoid power grid overload of the charging station, characterised in that the first maximum available power is calculated as APmax=GPmax+EPmax-RP where APmax represents the first maximum available power, GPmax represents a maximum available power of the power grid system, EPmax represents a maximum available power of the energy storage system, and RP represents a predetermined reserved power; or the first maximum available power is calculated as APmax=Pc*(GPmax+EPmax), where APmax represents the first maximum available power, GPmax represents a maximum available power of the power grid system, EPmax represents a maximum available power of the energy storage system, and Pc represents a power coefficient, where 0<Pc<1.