Abstract: A rotary airtight container having a body, a lid that covers the opening of the body, a cover plate connected to the underside of the lid, a lifting mechanism for driving the cover plate to move with respect to the lid, a circumferential cone-shaped seal ring positioned all around the lid, and a tapered annular interface that on the bottom of the lid and engages the seal ring. As the lifting mechanism drives the cover plate to lift relative to the lid, the cone-shaped seal ring lifts relative to the lid and moves upwards along the tapered annular interface to seal the space between the tapered annular interface and the opening of the container, thus isolating the inside of the container from outside. This container changes the ordinary way of sealing that uses a locking nut for tightly pressing on the opening of the container, and is easier to operate.