The invention discloses a lightweight high efficiency low noise duct type four-level electric fan propeller, and belongs to the aviation propulsion technical field; the propeller employs a brushless DC motor two motor shafts on two sides of the motor; the motor shaft on one side is fixed on a head cover, and the motor shaft on the other side is fixed on a tail cover; a first level fan, a first level flow deflector, a second level fan, a second level flow deflector, a third level fan, a third level flow deflector, a fourth level fan and a fourth level flow deflector are arranged in sequence from the head cover to the tail cover; the airflow passing the inner side of the engine are pressurized for four times; in addition, the inner wall of a nacelle and the outer wall of a radome are respectively provided with a noise reduction liner. The propeller is small in size, high in propulsion efficiency, can reduce operation noises, can reduce propeller weight, thus reducing making cost and maintenance cost, reducing harmful gas discharge, and improving propeller thrust weight ratio.