The invention relates to a plastic combination cover for a sealing hot filling product. The plastic combination cover comprises an outer cover and a gasket. The outer cover is in sealed threaded connection with a bottle opening, the bottle opening is further provided with a sealing cover, and the gasket is pressed on the bottle opening through the sealing cover. The invention aims to provide the plastic combination cover which is used for the sealing hot filling product and is simple in structure and according to which the outer cover does not deform and is easy to remove.