Vacuum storage tank

The invention discloses a vacuum storage tank, which comprises a tank body and a tank cover mounted on the tank body, the tank cover comprises: a housing provided with a rotating shaft and a first air inlet, the first air inlet being communicated with the interior of the tank body; the vacuumizing assembly is arranged on the shell and used for pumping out air in the tank body; the air inlet assembly comprises a lever, a key and a blocking piece, the middle of the lever is rotationally connected with the rotating shaft, the key is arranged at one end of the lever, a compression elastic piece is arranged between the key and the shell, the blocking piece is arranged at the other end of the lever, and the blocking piece can open or block the first air inlet along with rotation of the lever. During use, the key is pressed down to enable the blocking piece to tilt up and open the first air inlet, the first air inlet is communicated with the interior of the tank body, so that external air enters the tank body, the t