Propeller capable of preventing fishing net from being scratched

The fishing net scratching prevention propeller comprises a propeller body arranged on a transmission shaft, a protection sleeve used for protection is arranged on the outer side of the propeller body, positioning columns are symmetrically arranged on the two sides of the upper end of the protection sleeve, and the upper ends of the positioning columns are fixedly connected with the tail of a ship body; a conical filtering cover for preventing impurities from entering the protecting sleeve is arranged at the end, facing water flow, of the protecting sleeve, a penetrating hole in sliding fit with the conveying shaft is formed in the middle of the conical filtering cover, a rotating limiting piece is arranged between the penetrating hole and the conveying shaft, and a rotating sleeve is rotationally arranged at the inner end of the conical filtering cover; the device is designed aiming at the defects of an existing device, impurities can be prevented from being wound on the propeller, the problem of impurity bl