The invention discloses a wet mixing apparatus for producing vanadium-nitrogen alloy balls. The wet mixing apparatus has a stirring tank, wherein one side of the stirring tank is provided with a water box, the bottom portion of the water box is communicated to a water inlet pipe, one end of the water inlet pipe extends into the stirring tank, the end portion of the water inlet pipe inside the stirring tank is provided with an atomization spraying nozzle, the side wall of the stirring tank is provided with a plurality of material feeding pipes, and the material feeding pipe is provided with a gate plate capable of being pulled out and inserted. According to the present invention, the powder adding during the mixing is completed in the closed state, such that the possibility of the outward leaking and spreading of the dust is substantially reduced, and the dust pollution is reduced; the liquid adding amount can be accurately controlled according to the powder adding amount so as to ensure the quality of the product; and the dispersity is good during the adding of the liquid, the mixing with the powder is uniform and complete, no agglomeration is generated, and the stirring efficiency is improved.