The utility model discloses a charging device for an energy storage power supply, comprising a constant charging circuit, a constant power charging circuit, and a control module. The constant current charging circuit is used for performing constant current charging on the energy storage power supply; the constant power charging circuit is used for performing constant power charging on the energy storage power supply; and the control module is used for controlling the constant current charging circuit to charge energy storage power supply and controlling the constant power charging circuit to charge the storage energy power supply. Through the arrangement, the charging device for the energy storage power supply has low requirement for capacities of systems and devices and has low requirement for current resistance value of the devices.