The utility model belongs to the technical field of spraying devices, and particularly discloses a spraying device with uniform spraying thickness, which comprises a spraying chamber, a fixing frame is rotatably connected in the spraying chamber, a motor is arranged at the top of the spraying chamber, the top end of the fixing frame is fixedly connected with the output end of the motor, and a spraying
assembly is arranged in the spraying chamber; the number of the spraying assemblies is two, each spraying
assembly comprises a sliding block, one end of the sliding block is provided with a containing frame, the inner side of the containing frame is rotationally connected with a rotating roller, each spraying
assembly further comprises a sleeve, the interior of the sleeve is rotationally connected with a reciprocating lead screw, and the sleeve is fixedly connected with the inner wall of the spraying chamber. After spraying is completed, the outer wall of the
barrel-shaped object can be flattened, so that spraying liquid is evenly smeared on the surface of the
barrel-shaped object, the situation that the
coating liquid flows downwards to cause different thicknesses is avoided, it is ensured that the thickness of a
coating is consistent, the quality and appearance of the
coating are improved, and the bad effect caused by the uneven thickness of the coating is avoided.