Abstract: Landslide in gelifluction is a new geological hazard caused by human activity in permafrost region of Qinghai-Tibet plateau. It belongs to shallow landslide with small length-width ratio. In general, infinite slope analysis method is applied to it. According to identical seepage direction to slope surface,with the effective stress principle,the analytical expression of safety factor of the landslide in gelifluction with different water content conditions is derivated and stability analysis chart of dry and fully saturated water soil are plotted. Lastly,taking the Landslide in gelifluction in milestone K3035 of Qinghai-Tibet highway as an example,the paper analyzes and evaluats the stability of the landslide.