The invention discloses an airless spraying coater, comprising an air cylinder, a chassis, an air distributing block assembly, a reversing chamber assembly, a pump base assembly, a paint cylinder, a suction valve body, an output joint, a filter assembly, an air inlet joint, an air inlet tee, an air inlet filter core, an oil-mist device and an air inlet hose. The air cylinder is detachably connected with the air distributing block assembly. An air inlet channel, an air outlet channel and a reversing channel, which are capable of communicating the interior of the air cylinder with the air distributing block assembly, are respectively arranged at the top of the air cylinder and the chassis. An air inlet for allowing the entering of air is arranged on the side wall of the reversing chamber assembly. By using the structure, the invention has the advantages that the invention has a rational structural design and long service life, saves energy sources, does not easily go wrong, and can improve coating quality.