The invention provides a steel strand end anchoring device. The prestress steel strand strengthening technology integrates the advantages of the external prestress strengthening technology and the high-strength steel strand strengthening technology and is a novel strengthening technology, the high-strength property of steel strands can be brought into full play, however, an existing prestress steel strand end anchoring device cannot adaptively adjust steel strand prestress, an anchoring body system is destroyed due to steel strand prestress change caused by formation creep, steel loosening, structural change and the like, and the safety and stability of a building and a bridge cannot be guaranteed. The steel strand end anchoring device has the advantages that the device can adaptively adjust the steel strand prestress, the steel strand prestress change caused by formation creep, steel loosening, structural change and the like is avoided, the stability of the anchoring body system is enhanced, and the safety and stability of the building and the bridge can be guaranteed.