Single correlation screen indicated that the correlations were significant among 10 tree-ring chronologies and precipitation from June in the last year to May in the current year, and the maximum correlation coefficient was 0.584 (α=0.005). Using 5 tree-ring chronology series, the 314 a precipitation was well reconstructed and its explain variance was 75%. It is verified that the reconstructed precipitation was more reliable. Several conclusions obtained by analyzing the precipitation sequence reconstructed...