Abstract: The present disclosure provides a highly practical cryovial, which relates to the technical field of the cryovial. The cryovial comprises an inner tube, a transparent outer tube, a limit snap ring, a liquid control mechanism arranged inside the inner tube, a protection mechanism arranged on the transparent outer tube, and a sealed liquid taking mechanism arranged on the inner tube, wherein the liquid control mechanism comprises a push rod and a piston block which is movably connected with the inner tube, first spiral holes of the same size are formed at the corresponding positions of the bottom ends of the inner tube and the transparent outer tube, and the push rod is movably connected with the two first spiral holes respectively.