The utility model discloses a double-ball subsea valve. The double-ball subsea valve comprises a long-barrel-shaped valve body, two valve seats, two valve balls, two valve rods, two valve decks and two glands, wherein the upper portion of the left half portion of the valve body and the upper portion of the right half portion of the valve body are each provided with an assembly through hole, the portions, under the two assembly through holes, of an inner cavity of the valve body are both provided with valve seat installation stations, the two valve seats are arranged in the two valve seat installation stations respectively, the two valve balls are arranged in the two valve seats respectively, the two valve decks are arranged on the two assembly through holes in a covering mode respectively, the two glands are located in gland installation grooves in the middles of the upper ends of the two valve decks through bolts respectively, the valve rods downwards penetrate through the corresponding glands and the corresponding valve decks and are connected with the upper ends of the corresponding valve balls, the inner sides and the outer sides of the glands are matched with the valve rods and the valve decks in a sealed mode through a plurality of sealing rings respectively, and the inner cavity of the valve body, the assembly through holes of the valve body and the lower end faces, located in the assembly through holes, of the valve decks are all provided with nickel-base alloy layers in a build-up welding mode. The double-ball subsea valve is good in anti-corrosion performance and rigidity of the valve body, high in reliability and long in service life.