Abstract: Based on the synthesis analysis of the multiply indexes from the Dahu peat sequence obtained from the eastern South Mountain and the reliable testing of the radiocarbon ages, the variations of the paleo-climate in the eastern South Mountain during the past 12 ka were reconstructed. The results indicate that during about the 12~9 kaBP, the precipitation increased and the monsoon got stronger in this study region, and after 9 kaBP or so the precipitation decreased and the monsoon became weak. The results show that the general trend of the paleo-climate changes in the eastern South Mountain seems to follow the summer solar radiation variations at 33°N, which indicates to a certain extent that the climate responds to the variations of the solar radiation. The multiply indexes mainly reflect the variations of the climatic changes in the low-latitude regions while they also recorded some information from the high-latitude regions, which shows regional climatic characteristics as well as coherences to the global climatic variations.