The invention discloses a liquid sealing device and sealing liquid, belongs to the field of machinery, and in particular relates to an improvement on the structure of a liquid sealing device and sealing liquid used by the liquid sealing device. The invention provides the liquid sealing device which has a good parking sealing effect, does not leak and is difficult to damage and the sealing liquid. The sealing device comprises a sealing cavity, wherein a liquid sealing sleeve fixed with a rotating shaft is arranged between the rotating shaft of the sealing cavity and the sealing cavity; and a sealing liquid injection device is arranged on the sealing cavity and corresponds to the liquid sealing sleeve. The liquid sealing device is structurally characterized in that a centrifugal hammer with a pull hook is arranged at each of two ends of the liquid sealing sleeve through a cylindrical pin; a sealing iron ring is arranged outside the rotating shaft; a flange is arranged on the sealing iron ring and corresponds to the pull hook of each centrifugal hammer; a magnetic ring is arranged in the sealing cavity and corresponds to the sealing iron ring, a parking sealing ring is arranged outside the magnetic ring, and an end head is arranged at the end of the parking sealing ring and corresponds to the rotating shaft; and the sealing iron ring is provided with a pressing surface corresponding to the end head.