Gas nozzle capable of conveniently charging and discharging gas

The invention discloses a gas nozzle capable of conveniently charging and discharging gas. The upper-end opening of a first channel is lower than a ring-shaped fitted edge, so that a plug body is notbulged excessively after the plug body stops up the first channel and a choke plug stops up a second channel, and therefore, occurrence of a loosening condition due to the fact that the choke plug andthe plug body are touched by external force is reduced, and outstanding substantial characteristics and significant progress are achieved. Besides, a ring-shaped slot is formed, so that a finger extends into the ring-shaped slot to take a flexible arm on the position, and the plug body; and one end of the flexible arm is connected to a position, close to the ring-shaped slot, of the upper surfaceof the ring-shaped fitted edge, so that the outer edge of the ring-shaped fitted edge is not easily separated from an inflatable product when the flexible arm is outwards pulled, and therefore, outstanding substantial characte