Through studies and correlation of the 3 boreholes(Shunyi Gaoliying GZK1 borehole， Changping Machikou CHZK1 borehole and Daxing DZK1 borehole)in Beijing plain area， this paper analyzed the climate and vegetation change of this area since the Middle Pleistocene and the process was divided into 8  stages. During the first stage， the climate was cold and dry; during the second stage， the climate was warm and moist; during the third stage， the climate was cool and wet; during the forth stage， the climate was warm and dry; during the fifth stage， the climate was cold and dry; during the sixth stage， the climate was warm and damp in early time and cool and dry in late time; during the seventh stage， the climate was cold and dry; during the eighth stage， the climate was warm and wet.