As one of the environmental information records,peat plays an important role in global climate change research.Hani peat bog in northeastern China is located in sensitive ranges of global climate change,so it is more remarkable for studying.In this study,used alkali extraction method to measure the humification of Hani peat,combined with C~(14) dating data and compared it withdelta~(18) O time series of Hani peat cellulose,the Holocene climate changes of Hani area were rebuilt well.And the Holocence climate changes were divided into five stages:(1)11.5-9.8 kaBP with warm climate;(2)9.8-9.0 kaBP with the climate of sharply cooling and cold;(3)9.0-4.8 kaBP with cold and warm climate;(4)4.8-1.8 kaBP with the climate of fluctuations between cold and warm;(5)1.8-0 kaBP with cold climate.