Fissured clay is one kind of special clay. The failure of fissured clay slope is progressive. Traditional limit equilibrium method can not be used to simulate and analyze the process and mechanism of the slope progressive failure; and the judgment for long-term stability of slope is also not accurate. In this paper
the progressive failure process of fissured clay slope is simulated and the stability of slope is analyzed with FLAC code. The numerical analysis of an example shows that the simulation of the progressive failure of slope and the judgment for slope stability by FLAC code are feasible.