The utility model relates to the field of power equipment, in particular to a GIS single valve electric gas-charging connector which comprises main valve body. A gas chamber is arranged in the main valve body, an ejector pin is arranged at one end of the main valve body, a gas path I connected with the gas chamber is arranged in the ejector pin, a connection nut is arranged at the end, provided with the ejector pin, of the main valve body, a pipeline is arranged on one side of the main valve body, a gas path II is arranged between the pipeline and the gas chamber, a manual valve is disposed in the gas chamber and comprises a threaded sealing cap, a rotary screw rod and a screw cap which are connected in sequence, the threaded sealing cap is sleeved with a rubber gasket, and a check valve is arranged in the pipeline. By means of the connector, operation is safe, and manpower and financial resources are saved.