In order to study the mechanical properties of aerated inflation controlled anchor under long-term load, the creep test of aerated inflation controlled anchor was carried out in outdoor natural site. The test data were processed by Chen's method, and the displacement-time curve, isochronous load-displacement curve and stiffness regression curve were drawn. The creep law of aerated inflation controlled anchor was analyzed. The results show that under the same air pressure, when the applied load is less than 40% of its ultimate uplift bearing capacity. The inflatable anchor basically does not creep. The creep characteristics of inflatable anchors under different air pressures are different. At low air pressure, there are only two stages of deceleration creep and stable creep. When the air pressure is high, there are three stages of deceleration creep, stable creep and accelerated creep. Based on the Burgers model, the long-term uplift bearing capacity of the aerated inflation controlled anchor is 65% ~ 75% of its ultimate uplift bearing capacity by using the isochronous curve method and the transition creep method.