Here we displayed the results of trace elements and stable isotope in shell Gyraulus sibirica continuously preserved in the sediments of Xincuo Lake, Eastern Tibetan Plateau, in the past 50 years.By coupling these indexs and inst rumental meteorological data in its basin, we probed quantitatively modern climatic signals recorded in these indexes to build relat ive function relations.The results showed that gastropod shells in Xincuo Lake were formed in summer half year, so that trace elements, stable isotope in shells just recorded the climatic signals of the summer half year instead of those of the whole year, Mg/Ca ratio and δ¹⁸ O pro xy had a certain correlativity with summer half year air temperature, in which δ¹⁸O proxy was more sensitive with variability of δ¹⁸O to temperature d δ¹⁸O/dT 1.64‰/℃;As to Sr/Ca ratio and δ¹³C proxy, especially Sr/Ca ratio, there had a close correlation with summer half year precipi tation, in which the variability of Sr/Ca to precipitation d (Sr/Ca)/dP is -0.045/mm.