The invention discloses a charging device, and the charging device is used for charging an automobile storage battery or vehicle-mounted equipment. The charging device comprises a power supply module,a main control circuit, a lifting circuit, an adjusting circuit and an output port. The charging device charges the automobile storage battery or the vehicle-mounted equipment through the output port; the power module is electrically connected to the main control circuit and the lifting circuit and used for providing electric energy for the main control circuit and the lifting circuit. The main control circuit is also electrically connected with the adjusting circuit and the lifting circuit, and the main control circuit is used for outputting an adjusting signal to the adjusting circuit; theadjusting circuit controls the lifting circuit to output a first output voltage or a second output voltage to the output port according to the adjusting signal, and the second output voltage is greater than the first output voltage. The invention provides various charging voltages, and can meet the charging demands of the automobile storage battery.