The invention discloses a spraying device for hub production, and relates to the technical field of hub spraying. The invention aims to solve the problems of synchronism and efficiency. The spraying device specifically comprises a base and a clamping driving mechanism and a spraying mechanism. The clamping driving mechanism and the spraying mechanism are arranged at the top of the base and matched with each other, and the clamping driving mechanism comprises a supporting seat fixed to the outer wall of the top of the base through supporting legs, a driving assembly and a clamping assembly, wherein the driving assembly and the clamping assembly are arranged on the two sides of the supporting seat and matched with each other. According to the spraying device for hub production, when a hub descends due to gravity, a downward pressing supporting disc descends, so that a second piston descends, the pressure in a cavity of a main cylinder body is increased, a first piston is ejected out, a first connecting rod drives an L-shaped sliding block and a clamping cambered surface roller assembly to slide towards the outer side, the inner ring wall of the hub is clamped and fixed, and when the hub is sprayed, the hub is lifted upwards. A first spring can bounce the second piston, so that the clamping cambered surface roller assembly is shrunk towards the inner side, synchronism of clamping and taking and placing is achieved, and the efficiency is improved.