Fixing device for sacrificial anodes and single pile foundation

The invention provides a fixing device for sacrificial anodes and a single pile foundation. The fixing device comprises a ring beam, a plurality of first limiting structures and second limiting structures, wherein the ring beam is of a ring-shaped structure, and sleeves the single pile foundation; the plurality of sacrificial anodes are fixedly connected onto the ring beam in a peripheral direction; the first limiting structures are arranged on the ring beam in the peripheral direction; the first limiting structures are matched with supporting parts which are pre-arranged at the outer side ofthe single pile foundation for supporting the ring beam, so that peripheral motion, around the centre shaft of the single pile foundation, of the ring beam is limited; and the second limiting structures are arranged below joints of the first limiting structures and the supporting parts for blocking the first limiting structures from moving upwards in a direction parallel to the center shaft of thesingle pile foundation re