The study on retarded creep behavior using creep theory under condition of reservoir water lever in stabilized status for one and a half year demonstrates that the viscous coefficient of sliding soil shall increase as creep procedure continues , meanwhile , the displacement process of landslide surface area fitted by logarithmic curve matches closely with measured values 以蠕變理論研究在庫水位穩定一年半的條件下滑坡的減速蠕變現象,證明滑帶土粘滯系數隨蠕滑過程不斷增大,以對數曲線擬合滑坡表部位移過程與實測值吻合較好。