Under　the　background　of　global　warming,　natural　disasters　such　as　landslides　and　mudslides　are　becoming　more　frequent　on　the　Tibetan　Plateau.　It　is　important　to　study　the　thermal　behavior　of　alpine　meadow　soils,　which　are　widely　distributed　on　the　Tibetan　Plateau　due　to　the　high　altitude　and　extreme　climate.　In　this　paper,　a　quantitative　mathematical　model　of　thermal　conductivity　for　alpine　meadow　soils　is　presented,　which　successfully　describes　the　influence　of　plant　roots　and　organic　matter　on　the　thermal　behavior　of　alpine　meadow　soils.　A　series　of　thermal　conductivity　experiments　are　carried　out　on　thirty　alpine　meadow　soils　collected　from　Nangqian　district,　located　east　of　Tibetan　Plateau,　China.　The　results　of　the　proposed　model　are　compared　with　the　experimental　measured　data　to　validate　the　model　efficiency　and　satisfactory　agreement　is　achieved.　Furthermore,　Root　mean　square　error　(RMSE)　and　bias　are　also　used　to　evaluate　the　performance　of　the　proposed　model　and　other　available　models.　The　results　of　the　validation　analysis　show　that　the　proposed　model,　with　an　RMSE　of　0.041　W　m-1　K-　1　and　a　bias　of　0.005　W　m-1　K-1,　provides　reliable　and　accurate　estimated　values　of　thermal　conductivity　for　alpine　meadow　soils.　This　study　is　beneficial　for　understanding　the　thermal　behaviors　of　soil-root　system　on　the　Tibetan　Plateau.