Packaging container in nitrogen quality insurance

The utility model discloses a packaging container in nitrogen quality insurance. A drum body has a good sealing performance, one side of the drum body is provided with a nitrogen pressure tank [2], a switch knob [3], a metering device [4] and a nitrogen encapsulation opening [5], wherein the switch knob [3] is used for controlling the nitrogen pressure tank [2] to input quantitative nitrogen to the packaging container, the nitrogen encapsulation opening [5] is convenient for re-encapsulating nitrogen, the drum body [1] is made of transparent glass material, the drum body and an upper cover [6] are generally connected by adopting a rotary knob structure so that the opening and the sealing are convenient, a warning module is provided and is used for ensuring appropriate pressure of the nitrogen pressure tank [2] and emitting warning information in time when the pressure exceeds the bearing capacity of a tank body, and the warning information can be prompted in LED (Light Emitting Diode) light information or sou