Abstract：Thremosyphon is a widely used technology applied to the engineering projects in permafrost regions at home and abroad. Before the construction of the Qinghai-Tibet railway, there was little study on this technology. This study is based on the type of the thermosyphon used in the Qinghai-Tibet railway. For the weather and permafrost conditions of Qinghai-Tibet plautea are different from the conditions of foreign countries, it is not proper to directly apply their theory and productions to the design of thermosyphon embankments in Qinghai-Tibet railway. This paper will be useful for the design and application of the thermosyphon used in permafrost regions of Qinghai-Tibet railway.