The history and mechanisms for prehistoric human migration to the Tibetan Plateau has been increasingly concerned and intensively studied in recent years. New multidisciplinary studies revealed that human permanently settled above 3000m a.s. 1. (above sea level) of the Tibetan Plateau during mid-late Bronze Age (3600 ~2300 years ago),when three different cultures (Xindian,Kayue and Nuomuhong) distribute on the different altitude areas of northeast Tibetan Plateau. However, subsistence strategies of these cultures for adaptation to different environments and its influencing factors are not well understood. To figure out the aforementioned problem,we review the results of archaeobotanical,zooarchaeological and tools assemble analysis from mid-late Bronze Age sites and cemeteries in northeast Tibetan Plateau, and compare them with updating studies of palaeoenvironment and transcontinental cultural exchange in prehistoric Eurasia. It can be concluded that human adopted different subsistence strategies for adapting to surrounding environments in different altitude areas of northeast Tibetan Plateau during mid-late Bronze Age. Xindian groups primarily cultivated broomcorn and foxtail millets, and raised sheep and pig mainly in areas below 2500m a.s.l., and carbonized seeds of barely, wheat and millets accounted for 12.7%,0.9%,and 86.4% of crop remains, respectively. Kayue groups engaged firstly in sheep-herding, and secondly barley cultivation mainly in areas between 2500~3000m a.s.l.,and carbonized grains of barley, wheat and millets accounted for 64.2%, 3.7% and 32.1% of crop remains, respectively. Nuomuhong groups adopted agro-pastoralism for adapting to the environment above 2800m a. s. 1., mainly cultivated barley and herd yak and sheep in Qaidam Basin,and charred seeds of barley,wheat and millets accounted for 89.4%,1.6% and 9.0% of crop remains,respectively. These three groups also engaged in hunting activities, which were auxiliary subsistence strategies in northeast Tibetan Plateau during mid-late Bronze Age. The weight of foxtail and broomcorn millet that are sensitive to low temperature obviously declined,while that of coldtolerant barley evidently increased, with the rise of bronze sites altitudes in the area. This pattern suggests human successfully adapted to different altitude areas by adopting different strategies to utilize plant and animal resources during mid-late Bronze Age, which was facilitated by agricultural innovations that were promoted by cultural expansion and exchange across Eurasia, and climate change featured by temperature decline in late prehistoric times, as well as the distinctive natural environment in northeast Tibetan Plateau.