Based on two kinds of proxy data,a tree-ring width chronology at Huashan and the wetness/dryness grade series around Xian in north-central China,this present study demonstrates how different types of proxy climate records can be combined to give a more reliable estimate of the climate in the past than either record candoindividually,With comparison and correction of the two data sets, various statistical models can be developed from individual and combined series.Among them, the best combined model produced by the conditional quantile adjustment method can be selected for reconstruction of April-July rainfall at Huashan back to 1600 A.D.