The invention provides a polymer injection high-pressure ball valve driven by a worm wheel and a special product for an oil deposit polymer injection project. The ball valve comprises a valve body, a double-end bolt, a flange, padding, an O-shaped ring, a valve seat, a sphere, the padding, a valve rod, the O-shaped ring, a loop bar, a bolt, a flange seat and a worm wheel device, wherein the padding between the valve seat and the sphere uses nylon products as sealing face padding which is the soft forming padding and good in sealing property, a force unloading device uses a worm wheel and worm transmission mechanism, a circular hand wheel installed on the worm wheel device controls an on-off state of the valve. The ball valve has the advantages of being small in hydraulic resistance, a resistance coefficient is equal to a tube section with the same length with the ball valve, and the ball valve also has the advantages of being low in solution shear rate, saving time, saving labor, opening and closing quickly through adoption of a worm driving device. Because of adoption of the nylon sealing face padding which is good in sealing property, the ball valve is long in service life, small in occupied area, light in weight, convenient to operate, simple in structure, convenient to dismantle and replace, convenient to maintain and the like.