The self expansion high strength preloading anchoring technology was put forward to improve the pulling resistance of anchor rod. In order to make it more suitable for engineering, the study on its construction performance and long term stability was carried out. The results show that the anchoring material can improve the fluidity of cement slurry. Prolonging the initial setting time of slurry and shortening the time difference between initial and final setting of slurry are beneficial to construction. Based on the CT scanning test, the density and pressure of the anchoring material are measured, and the rule of gradual change from the outer ring to the inner ring is established, and the stress mechanism is revealed from diameter and circumferential direction. Under the condition of circumferential restraint and long term drying, the CT number of the anchors before and after the interval of 551days is only 05%. Under dryness condition, its compactness(volume) stability is maintained for a long time. Compared with the long term immersion of the anchors, the expansive pressure and the ultimate pullout force of the anchors changed little, and the ultimate pullout force of the anchors with 15% expansive agent changed only 09%. It shows that the ultimate pullout force of this technique can be kept stable for a long time.