An electronic device and an unlocking cover thereof are provided. The unlocking cover includes a shield, at least one assembling portion, and at least one abutting portion. The shield has a baffle and a shielding board that is connected to the baffle. The at least one assembling portion extends from the baffle. The at least one abutting portion extends from an inner surface of the shield. A distal end of the at least one abutting portion away from the shielding board is spaced apart from an inner surface of the shielding board by a triggering height that is within a range from 3.5 mm to 9 mm.