Sealed pressure vessel for high-pressure accelerated aging test

The invention relates to a sealed pressure vessel for high-pressure accelerated aging test, which comprises a box body, a pressure cabin and a humidifying device, the pressure cabin comprises a cabin body, a cabin door and a sealing mechanism, and the sealing mechanism comprises a first sealing ring arranged at the opening of the cabin body along the circumferential direction and a second sealing ring arranged on the side wall of the cabin door. The sealing chain surrounds the periphery of the first sealing ring, the driving assemblies are connected with the two ends of the sealing chain correspondingly, the length of the sealing chain is smaller than the perimeter of the first sealing ring, the sealing chain comprises a plurality of clamping pieces and first connecting pieces, the clamping pieces and the first connecting pieces are arranged at intervals, the two ends of each first connecting piece are rotationally connected with the adjacent clamping pieces, and grooves are formed in the side faces of the cl