The Datong Basin developed thick fluvio-lacustrine sediments in Quaternary period and aeolian loess overlied,which recorded an abundant information on past climatic and environmental changes.To analyze the climate changes,we mainly use the primary oxides as climate proxies to establish the age framework according to stratigraphic dating data,combining formation susceptibility and particle size.The results showed that:(1)The average content of chemical elements of the sediments in the constant formation was SiO_2>Al_2O_3>CaO>Na2O>TOFE>K2O>MgO from high to low,the sedimentary facies of different elements are obviously different,reflecting elements vary with climate change.(2)The Datong Basin climate change experienced the following 5 stages:The research area climate was warm-humid during the Middle Pleistocene of 220-199 ka BP,and cold-dry climate occurrenced during the Middle Pleistocene of 199-138 ka BP,and warm-humid climate occurrenced during the last interglacial period of 138-71 ka BP,and colddry climate was showed during the last glacial stage of 71-11 ka BP,and the Holocene periodclimate was alternate variationsof warm-wet and cold-dry.However,during each period there is still less-grade climate fluctuation level.(3)These climatic changes is similar with Salawusu River and Inner Mongolia Daihai region roughly in the same latitude,and are well accordant with the global climatic change reflected by the deep-sea oxygen isotope and the polar ice core,showing a consistency in time of climatic change between the study area and the global.The climate change in this area is regional response of global climate change influenced by the East Asian winter and summer monsoon.