Maar Lake recorded paleoclimate changes like a natural gauge. Themorphological features of Maar Lake ensue to homogeneity of detritus input and high-resolution record of paleoenvironmental variations. The research of Maar Lake will play an important role for reconstructing paleoclimate history. Maar Lake Huguangyan is located in Leizhou Peninsula, the southern China, near Pacific Ocean in the east and South China Sea in the south, where which is intersect site of eastern southeast monsoon and southwest monsoon and sensitive to climate change.The sediments from Maar Lake Huguangyan have been recovered.The concentrations of biogenic silica, total organic carbon, total nitrogen and total hydrogen inferred from the sediments of Maar Lake Huguangyan provide a climate record of the last deglaciation with century resolution. The records fully demonstrate the Younger Dryas event is well documented in the southern China, which occurred synchronously with that recorded in Greenland, and point to the cool and dry climatic conditions during this period, because of the remarkable decrease of precipitation and temperature. These results suggest the rapid reorganization of atmospheric circulation in monsoon climate system in short time, and reflect that the intensity of the summer monsoon was reduced during the Younger Dryas period.