The invention discloses a hawse pipe cover which comprises a cover body. An anchor chain through hole is formed in the center of the cover body, and a sealing ring is arranged on the outer ring of the cover body. A cover edge is arranged on the inner side of the cover body and provided with a plurality of holes, and locking blocks are fixedly arranged at the holes correspondingly. A groove is formed in the center of each locking block, a screw hole is formed in the center of each groove, and a locking screw penetrates through the corresponding screw hole and the corresponding hole to be attached to the inner wall of a hawse pipe. The hawse pipe cover further comprises a screwing device which comprises supporting columns and a rotating handle. The rotating handle is fixedly arranged on the inner side of the anchor chain through hole, the supporting columns are fixedly connected with the rotating handle, the column head of each supporting column is of an arc structure and matched with the groove in the center of the corresponding locking block, and a high-sensitivity pressure sensor is arranged in an inner cavity of each column head and connected with an external alarming system. The hawse pipe cover is simple in structure, and a dual-theft-prevention function can be achieved; and in addition, alarming signals can be sent immediately when outlaws pry the hawse pipe cover, and the ship safety is guaranteed.