Dustproof structure of brushless motor

A dustproof structure of a brushless motor comprises a stator assembly, a rotor assembly and a shell, the stator assembly is installed in an inner cavity of the shell, the rotor assembly is arranged in the stator assembly in a penetrating mode, and a fan blade connecting end of a rotating shaft of the rotor assembly extends out of the shell. A dustproof cover is connected in the mounting groove, and a cover body through hole for the rotating shaft to penetrate through is formed in the middle of the dustproof cover. The brushless motor has the advantages that the dustproof cover can fill the space between the through hole of the shell and the rotating shaft, dust is prevented from entering the inner cavity of the shell from the through hole of the shell, a good dustproof effect is achieved, and the service life of the brushless motor is prolonged. The rotor assembly is also provided with a first dustproof sheet and a second dustproof sheet, thereby further improving the dustproof capability of the brushless mo