Development of the new algorithm to accelerate molecular dynamics method for studying of nuclear materials is important and necessary for nuclear material society,especially by including the diffusion and interaction processes at the atomic scale.A selfadaptive accelerated molecular dynamics(SAAMD)method has been developed in the present work to model the infrequent atomic-scale events,which is especially suited for treating events that occur on a rugged free-energy surface and with huge different time scales.Key in the new development is the use of the total displacement of the system at a given temperature to construct a boost-potential,which is then used to combine with original potential to increase to accelerate the dynamics.