The invention discloses an all-series axle assembly automatic spraying and coating line comprising a base, an absorbing plate and a drying chamber. The base is internally provided with a conveying device, the outer wall surface of the conveying device is fixedly provided with a clamping block, the inside of the clamping block is provided with a notch, a rubber block is adhered to the inner wall surface of the notch, a dust removing chamber is arranged above the conveying device, and the absorbing plate is arranged below a discharge needle plate. According to the all-series axle assembly automatic spraying and coating line, the notch is arranged, so that the clamping block is capable of locking an axle to be coated; friction between the axle and the clamping block can be maintained by the rubber block, and meanwhile, the effective contact area between the axle and the clamping block is reduced, so that the degree of wear between the axle and the clamping block is reduced; and deformation generated by the rubber block enables action force between the axle and the clamping block to be buffered, so that a certain degree of damage to the axle and the clamping block due to the too largeaction force between the axle and the clamping block is avoided, and the axle can be protected by the rubber block.