Abstract：Research purposes: Plateau，permafrost and environmental problems are the three major problems in the construction of Qinghai － Tibet railway，and its particularity and complexity are unique in the world history of railway．The stability of embankment on slope in permafrost regions is extremely complexity and variability due to the unique environment and climate conditions． Therefore，it is necessary to study on the stability of embankment on slope to ensure the long term stability and operation safety of Qinghai － Tibet railway．
Research conclusions: The stability calculation of embankment slope in permafrost regions not only refers to ordinary slope analysis methods，but also considers the time factor． In addition，the stability reinforcement of embankment slope still can take the following methods，such as the selection of filter，the geogrid，the anti － slide piles，and so on． The results drawn in this paper can provide reference to the construction and management of plateau railway in the future．
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2011, Vol. 28 
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