The utility model discloses full-automatic
nitrogen charging equipment of a photoelectric instrument, which comprises a protection box, a right-angle placing cavity is arranged in the protection box, the left part and the right part of the right-angle placing cavity are a tank body placing cavity and a guide
pipe accommodating cavity, a rubber sleeve and a
nitrogen tank are arranged in the tank body placing cavity, and a pressing plate and an
electromagnetic valve are arranged above the tank body placing cavity. A through hole is formed in the surface of the pressing plate, the
electromagnetic valve penetrates through the through hole to be in threaded connection with a gas outlet
pipe of the
nitrogen tank, a gas guide
pipe is fixedly connected to the surface of the
electromagnetic valve, a vacuum bag is arranged at the end, away from the electromagnetic valve, of the gas guide pipe, and an opening binding strip is fixedly connected to the surface of the vacuum bag. A connecting node of the air guide pipe and the photoelectric instrument is located in the vacuum bag, a convex pressing block is arranged in the guide pipe containing cavity, and the air guide pipe penetrates through the lower end of the convex pressing block to be connected with the photoelectric instrument. Through the structure, the hidden danger that the nitrogen tank is damaged is reduced, and the sealing effect in the nitrogen filling process is improved.