Abstract: Water sometimes is very important in the turmel stability analysis. So water factor should be considered if analysis the tunnel stability that is hydraulic coupled analysis. Through hydraulic coupled analysis for turmel, the result can be dose to the real. As now,finite difference nethod is often used for hydraulic coupled analysis; the most common software is FLAC. In the paper, the Qingshui railway tunnel stability is analyses by finite difference method, three cases is researched, the calculating result is very well to the real appearance.