Bashang area of Hebei Province is located in the East Asian monsoon-margin region and the ecotone between agriculture and animal husbandry.East Asian monsoon variability significantly affects the development of human civilization within its area of influence.In order to reconstruct the climate changes in Bashang area and understand the interactions between past climate and human civilization,a continuous 120cm sediment profile was recovered from Anguli-Nuur Lake based on phytolith and pollen analysis.The results show that the climate in this region was gradually becoming cold and dry during the last 5 000 years,which is related to the weakening of East Asian monsoon produced by gradual variations of solar radiation.However, the climate was relatively wet during the periods of 5 030-3 074cal.a BP.On the centennial scale,Anguli-Nuur has experienced seven obvious cold and dry events,which occurred during~4 500cal.a BP,4 100-3 800cal.a BP,~3 500cal.a BP, ~3 000cal.a BP,~2 100cal.a BP,~1 100cal.a BP and 800-270cal.a BP.The cold and dry events are consistent with the weakening stage of East Asian monsoon that is probably affected by high latitude climate and the solar activities.In this region, the development of human civilization is sensitive to climate change.Agriculture civilization is relatively developed during warm and humid stage,and grassland civilization appears during cool and arid stage.