Fully-sealed movable die assembly for die-casting die and die-casting die

The utility model relates to the technical field of die-casting devices, and provides a fully-sealed movable die assembly for a die-casting die and the die-casting die, the fully-sealed movable die assembly for the die-casting die comprises a first frame body, a second frame body, an ejector rod push plate, an ejector rod fixing plate, a connecting piece and a sealing ring, the ejector rod push plate and the ejector rod fixing plate are movably arranged in the movable space, and one end of the ejector rod is clamped on the ejector rod fixing plate; one end of the connecting piece is clamped on the ejector rod push plate, and the sealing sleeve is arranged on the outer side of the connecting piece. Compared with the prior art, the connecting structure has the advantages that the sealing ring is arranged on the outer side of the connecting piece, when the connecting piece moves towards the direction close to the second frame body, the sealing ring is pressed on the sealing ring to be stressed and expanded, and