Energy-saving and environment-friendly efficient powder selecting machine

The invention discloses an energy-saving and environment-friendly efficient powder selecting machine. A separating cylinder of the energy-saving and environment-friendly efficient powder selecting machine comprises an upper cylindrical cylinder I and a lower inverted-cone cylinder I; an air inlet pipe is mounted on the cylindrical cylinder I, a feeding inlet is formed in the position, above the air inlet pipe, of the cylindrical cylinder I, a qualified powder discharging outlet in the top of the cylindrical cylinder I communicates with a negative-pressure exhaust pipe, a rotor is arranged in the position, below the qualified powder discharging outlet, of the cylindrical cylinder I, and a cylinder opening in the bottom end of the inverted-cone cylinder I serves as a slag outlet I; an innerseparating cylinder is arranged in the separating cylinder and comprises an upper cylindrical cylinder II and a lower inverted-cone cylinder II, the cylindrical cylinder II is arranged in the cylindrical cylinder I and locate