The invention discloses a can sealing wine cap, including an outer wine cap, an inner wine cap covering the top of the outer wine cap for sealing the mouth of the wine can, and an upper cover body having a plurality of key opening devices connected to the outer wine cap body. The invention realizes effective sealing of the can container by cooperating with the inner wine cap and the outer wine cap, and the key opening device is set to increase the opening guidance of the overall wine cap. The key opening device is tightly connected and fixed with the aluminum foil cover, which solves the problem that the connection and fixation of the existing wine cap pull ring opening method is insufficient and the breakage during the tearing process is insufficient; the key opening device is made of HDPE material, the softening point is 125~135℃, and the use temperature can reach 100℃; the hardness, tensile strength and creep are better than low density polyethylene; the wear resistance, electrical insulation, toughness and cold resistance are better; the chemical stability is good, and it is not soluble in any organic solvents under room temperature. Acid, alkali and corrosion of various salts.