The climatic significance of stalagmite δ18O from China monsoon area still remains unclear. High-resolution comparative study between stalagmite δ18O and other climate proxies from same area is the key to this issue. In this proposal, we focus on the stalagmite from Jinsuo island of Erhai. A high-resolution record of stalagmite δ18O will be obtained according to the combination of layer counting and U-Th dating. By comparative study with modern meteorological data and lacustrine records from Erhai, the climatic significance of stalagmite δ18O in southwest monsoon area will be discussed. Base on the above findings, a stalagmite δ18O record with annual to seasonal resolution during the last 2000 years will be established. The characteristics of key abrupt climate change events such as Medieval Warm Period, Little Ice Age and Current Warm Period will be analyzed in detail. Furthermore, by comparing with records of marine sediment, ice core and stalagmite δ18O from other area of East Asian, we will investigate the controlling factor and mechanism of abrupt climate change and our results could provide important evidence for future abrupt climate predication under similar climate backgrounds.