It is important to study seepage forms of confined water on translational landslide

which is helpful to accurately evaluate the slope stability and provides a reasonable theoretical guidance for studies on the disaster mechanism on translational landslide. Based on the variation law of seepage width of confined water

the seepage forms of confined water on slide plane of translational landslide are divided into the radiation flow and the non-radiative flow. According to different seepage forms

the translational landslide analysis models are established. Based on the theory of groundwater flow to canals

the water head line equation of confined water and the calculation formula of uplift pressure in different models are deduced. Furthermore

three kinds of uplift pressure distribution forms are put forward

and then the starting criterion of translational landslide is modified. Finally

based on a case of translational landslide

the law of slope stability under different forms of seepage is discussed.