Holocene palaeo-flood slackwater deposits (SWD) were found in Yijun reaches of the Beiluohe River in the middle rea-ches of the Yellow River.They were identified by sedimentary criteria during fieldwork initially.A set of three beds of palaeo-flood SWD was interbedded in the Holocene loess-soil sequence within the cliff riverbanks.Each of the SWD represents one individual palaeo-flood event.The analytical results of grain-size distribution and magnetic susceptibility indicate that these SWD beds were deposited from the suspended sediment load in the floodwater.According to climatic and stratigraphic correlation with the OSL da-ted Holocene profiles in the region, these palaeo-flood events occurred during 8000-7800 aBP (SWD1), 6000-5000 aBP (SWD2) and 4200-4000 aBP(SWD3), respectively.The palaeo-flood peak discharges were calculated by hydrological models and estimated to between 13600 and 14100 m³/s.The archives of flood data were therefore extended to a time-scale of over 10000 years.A more reliable flood peak discharge and frequency relationship was established accurately.These results are very important in hydraulic engineering and mitigating flood hazard in Beiluohe River basin.These palaeo-floods are well correlated to the abrupt climatic events occurred during the mid-Holocene Climatic Optimum.They provide solid evidence for investigating the social im-pacts of per-historical floods on the decline of the Neolithic civilizations in China' s monsoon regions.