The sequence and interlayer regular of the palaeosoil,peat layer and melt-frozen folded layers,as well as lake terraes,lake level's changes, palaevegetation and ostracoda assemblages showing the early holocene climate was cool and dry,the middle holocene was warm and humid,the late holocene was temperate and semi-arid climate in the transitional agricultrue-animal husbandry.Above data was reflected the 2000 years cycle of climate change in the holocede.The sequence of dry,humid,cool and warm of environmenta...