Extraterrestrial celestial body sample sealing device

The invention discloses an extraterrestrial celestial body sample sealing device. The extraterrestrial celestial body sample sealing device comprises a sealing cover body, a sealing rubber ring, a sealing cylinder body, a pressing ring and a heating device, the sealing cover body is provided with a circumferential knife edge and a rubber ring sealing groove from top to bottom along the axis, the sealing rubber ring is arranged in the rubber ring sealing groove, the sealing cover body is coaxially matched with the sealing cylinder body, the pressing ring is nested in the heating device to form a kinematic pair, the heating device is coaxially matched with the sealing cylinder body, and the sealing cylinder body is arranged in the sealing cylinder body. A power connection terminal is machined at the top of the barrel, voltage is applied to the power connection terminal, a heating device heats the pressing ring to enable the pressing ring to generate phase change and contract inwards, the barrel bears pressing f