Highprecision 230Th dating and carbon and oxygen isotopic analysis were carried out on stalagmite from Benle Cave in Chamdo,Tibet Plateau to establish a midHolocene paleoclimate change record in Chamdo of Tibet since 7 ka BP. Carbon and oxygen isotopic records of stalagmite reveal that the climate evolution since midHolocene (about 7 ka BP) in Chamdo, Tibet can be approximately divided into three climatic periods. ① Warm period of 7000~4500 a BP, during which the overall climate was warm and humid, with temperature slowly cooling. ② Temperature falling period of 4500~2300 a BP. As the temperature continued cooling, the climate became dry. ③ Temperature rising period of 2300 a BP, during which the air temperature and precipitation fluctuated and were rising. Carbon and oxygen isotope records of stalagmite show that since the middle Holocene the climate changed from warm and humid, rapidly falling temperature and drought, and to strong fluctuating and rising in the study area. A comparative analysis of isotope records of stalagmite in Dongge cave indicates that the slop and fluctuating amplitudes of δ18O curves of stalagmite in Benle cave are significantly higher than that of stalagmite in Dongge cave. The results above suggest that the climate fluctuation and temperature change in the monsoon region of Eastern Qinghai Tibet Plateau was consistent with that in global, and the isotope record of stalagmite in plateau was more sensitive to climate change. The trend of climate change reflected by the isotope record of stalagmite in Chamdo was positively related to summer solar radiation intensity in low latitude areas, and this indicates that the variation of the solar radiation intensity was an important driving factor in the monsoon area in the Tibetan plateau.