The invention relates to a spraying device, comprising a rotating shaft, a support, a No 1 spring bearing arranged on the rotating shaft, a connecting rod welded on the rotating shaft, a counter weight block welded on the connecting rod, a rotating disk in key connection with the rotating shaft, a clamping plate the two ends of which are respectively connected with the rotating disk and a driving disk by screws, a driving shaft in key connection with the driving disk, a No 2 spring bearing and a drive bearing which are arranged on the driving shaft, a turbine reducer connected with the rear end of the driving shaft by a coupler, a front dust guard and a rear dust guard which are respectively connected with the front and back of the clamping plate by screws, a middle dust guard connected with the front dust guard by screws, a fixture and a shaft sleeve which are arranged on the clamping plate as well as a sealed bearing and a driving gear which are arranged on the shaft sleeve. The device provided by the invention is simple in structure, is easy to realize multi-workpiece multi-part multi-coating spraying in once clamping.