A flexible spine fixing structure for fixing to a first vertebra and a second vertebra includes a first flexible element and a second flexible element. The first flexible element includes a first flexible part, a first fixing part and a second fixing part. The first fixing part and the second fixing part are respectively connected to two ends of the first flexible part and used for fixing to the first vertebra, and the first flexible part includes a first through hole and a second through hole. The second flexible element includes a second flexible part, a third fixing part and a fourth fixing part. The third fixing part and the fourth fixing part are respectively connected to two ends of the second flexible part and used for fixing to the second vertebra. The second flexible part is disposed by penetrating through the first through hole and the second through hole.