A waterproof assembly includes a casing, a gasket, and a cap. The casing has an opening. The gasket includes a main body and a protruding portion. The main body has a first circular raised structure configured to abut against an inner surface of the casing. The protruding portion is connected to the main body and is configured to at least partially protrude out of the casing through the opening. The cap is configured to abut against a side of the main body away from the opening. The cap has a through hole configured to be aligned with the protruding portion. The casing further has a plurality of fixing members configured to abut against a side of the cap away from the gasket.