Nitrogen charging structure of sighting telescope and sighting telescope

The embodiment of the utility model relates to a sighting telescope nitrogen charging structure and a sighting telescope. The sighting telescope nitrogen charging structure comprises a fixing part, an elastic part, a piston and a piston groove. The fixing part is embedded in a nitrogen charging fixing groove formed in the sighting telescope shell; the elastic part is slidably connected with the fixing part; the elastic part is provided with an inflation channel; the axis of the inflation channel is perpendicular to the sighting telescope shell. The bottom surface of the piston groove is fixedly connected with the inner cavity wall of the sighting telescope; the piston is contained between the groove of the piston groove and the outlet end face of the inflation channel. The elastic part slides in the direction from the inlet end of the inflation channel to the outlet end of the inflation channel within the preset stroke range, so that the outlet end face of the inflation channel abuts against the piston to the