The machine adopts a rotary quantitative feeding device, which continuously feeds and continuously injects a quantitative amount of seed dressing liquid. It is controlled by a flow controller to make the ratio of seeds to seed dressing accurate and easy to adjust. It is equipped with a high-speed centrifugal disc (to atomize the seed dressing liquid) and a large stainless steel cylinder (to stir) to achieve a good coating effect. The machine has a good working environment, good air tightness, safety and reliability, extremely low seed breakage rate, and overload and overheat protection of the electronic control system. A heated liquid tank can be equipped in high-cold areas, so users do not have to worry about the freezing of the seed dressing liquid.