In this paper we studied the core GSA (11 m) which was taken from Lake Tianchi of Liupan Mountain in the areas of magnetic susceptibility,anhysteretic remanent magnetisation,and isothermal remnant magnetization.The results show there are two kinds of magnetic minerals in the GSA: ferromagnetic and anti-ferromagnetism.The changes of sedimentary magnetic characteristics of Lake Tianchi are dominated by two patterns: high (low) dust input showing weak (strong) summer monsoon,and strong (weak) soil development showing strong (weak) summer monsoon.Magnetic susceptibility χ,which has recorded the climate change history of study area,can be divided into two parts: from 6200 to 1300 cal a B.P.,from 1300 cal a B.P.to present.The climate changes in the past 6200 years in the study area were similar to that in the monsoon area in millennial time scales,but much different in century time scales.The reasons could be that the climate of study area was not only controlled by summer monsoon,but also by other factors,such as winter monsoon and human activities which lead to the changes in vegetation of the Loess Plateau.