Vacuum die-casting mold sealing structure

The utility model discloses a vacuum die-casting mold sealing structure which comprises a moving die sleeve plate, a moving die insert, a fixed die sleeve plate and a fixed die insert, wherein a mold cavity is formed between the moving die insert and the fixed die insert; a push rod which can move up and down reciprocatedly is arranged inside the moving die insert; a clearance is kept between the push rod and the moving die insert; a sealing sleeve for blocking the clearance sleeves the push rod; and at least two seal rings are sequentially arranged on a contact surface between the sealing sleeve and the moving die insert at intervals. The vacuum die-casting mold sealing structure disclosed by the utility model, by virtue of the sealing sleeve which sleeves the push rod, can effectively prevent external gas from leaking into the mold cavity from the clearance on the push rod; and meanwhile, by additionally arranging multiple seal rings on the contact surface between the sealing sleeve and the moving die insert, the sealing property on the clearance of the push rod is further improved and a vacuum degree inside the mold cavity is effectively guaranteed.