The bottom-up physical regionalization based on land type units can establish more clear boundaries,which is dramatic breakthroughs of research in physical regionalization.The study area is located in the mountainous areas of eastern Tibetan Plateau.The research on bottom-up physical regionalization based on land type units is implemented by means of a combined method of SOFM network models and GIS.Topographic index,warmth index, humidity index,LCI index and hydrological index can be seen as input layer variables,and land type units and natural zones are regarded as background and regionalizing target.The results show that:(1)the land types are aggregated into five natural regions,namely alpine sparse vegetation plateau,alpine meadow plateau,alpine shrub-meadow plateau,alpine shrub-meadow in mountain-valleys,and coniferous forestland in mountain-valleys.(2)The boundaries of this zoning are close to scheme of ecological regionalization in China. Therefore,the results of network classification show that there is high concentration at spatial scale,which represents natural geographical characteristics in the mountainous areas of eastern Tibetan Plateau.This study can provide new ideas and methods for bottom-up physical regionalization based on land type units.