The utility model discloses an anti -leakage valve, including valve body, valve rod, O shape sealing washer, packing ring, pressure cap and be used for twisting the hand wheel that changes the valve rod, that section inner wall of pressing cap sleeve dress valve rod be bright and clean inner wall, and has laid two O shape sealing washers at this section valve rod with pressing between the cap axial interval, and the opposite side at two O shape sealing washers is established respectively to two packing rings, and forms the oil storage tank between two packing rings, have in the oil storage tank seal oily. Because the utility model discloses on the valve rod suit two O shape sealing washers to having designed the oil storage tank between two O shape circle, can having filled sealed oil in the oil storage tank, it is sealed completely to utilize sealed oil to go on the clearance, and it is sealed and lubricated to make valve O shape sealing washer when using remain the grease throughout, thereby improves the sealing performance and the durability of valve, in life -span of reinforcing valve and sealed, prevents the emergence of gas leakage accident.