Adjustable pressing pressure vessel

The invention discloses an adjustable pressing pressure vessel which comprises a tank body, a tank cover, a height adjustable mobile bracket and an adjustable pressing device. The tank cover is mounted on the tank body. The adjustable pressing device is mounted on the mobile bracket. An upper ring mounting plate and a lower ring mounting plate are arranged at the connection part between the tank cover and the tank body. A hydraulic opening is formed in the tank cover. A hydraulic cover is mounted on the hydraulic opening by virtue of a bolt. A lifting plate is mounted at the upper end part of the mobile bracket. The tank cover is connected with the tank body in a pressing manner, arc-shaped pressing plates are mounted on a hydraulic driving device on the mobile bracket by virtue of cross rods and vertical rods, and the arc-shaped pressing plate is driven by the hydraulic driving device to tightly press the upper ring mounting plate, so that the upper ring mounting plate can be tightly pressed on the arc-shape