Based on the model of slope engineering geology, the creep and its bailure mechanism of tall and bedding slope are deeply analyzed in thes paper. The creep laws of weak intercalations are also discussed. The analysis on the stability of creep slope and the age forecasting of sliding slope have been conduted through numerical simulations using Finite Element Method (FEM) and Distinct Element Method (DEM) Based on the model of slope engineering geology, the creep and its bailure mechanism of tall and bedding slope are deeply analyzed in thes paper. The creep laws of weak intercalations are also discussed. The analysis on the stability of creep slope and the age forecasting of sliding slope have been conducted through numerical simulations using Finite Element Method (FEM) and Distinct Element Method (DEM)