Dual compression pressure vessel with two cover bodies

The invention discloses a dual compression pressure vessel with two cover bodies. The dual compression pressure vessel comprises a tank body, a tank cover mounted on the tank body, a height-adjustable movable support, and a compression device mounted on the movable support, wherein an upper circular ring mounting plate and a lower circular ring mounting plate are arranged at the joint between the tank cover and the tank body; a hydraulic opening is formed in the tank cover; and a detachable hydraulic cover is mounted above the hydraulic opening. The dual compression pressure vessel provided by the invention has the advantages that two door covers are closed in a compression type; the door slots of the two door covers can be totally pressed and blocked by a strip pressing plate which is mounted through a second hydraulic cylinder, so that the door covers are very convenient to open and close; a sealing rubber mat is arranged on the strip pressing plate, so that the sealing performance can be improved after the