Antarctic ice core is an ideal paleoclimatic and paleoenvironmental carrier， which records the past variations of various parameters such as air temperature， precipitation and their major factors， e.g. solar activity， volcanism. High-resolution geochemical analyses of LGB69 ice core， East Antarctica show that \mathrm{①} Based on the combination of seasonal variations of δ¹⁸O and Na⁺ with volcanic eruption markers， LGB69 ice core is dated to 290 a （A.D.1712-A.D.2001）±2 a through annual layer counting， with a high average annual accumulation rate of 259 mm w.e./a； \mathrm{②} Five-year moving average （A.D.1968-A.D.2001） of δ¹⁸O of LGB69 ice core has good positive correlation with that of temperature departure at adjacent Davis Station， indicating that δ¹⁸O is an effective proxy for air temperature. Air temperature from A.D.1712 to A.D.2001 in LGB69 region is a process of fluctuating warming， which can be divided into four stages. The average annual value of 5-year moving average temperature departure is 0.43 ℃ higher than that of last cold stage in the Little Ice Age which ended in A.D.1914； \mathrm{③} By Morlet wavelet analysis， both δ¹⁸O （air temperature） and accumulation rate （precipitation） of LGB69 ice core from A.D.1712 to A.D.2001 present ca. 11-year， ca. 22-year and ca. 60-year cycles. Multinest of cycles for δ¹⁸O， accumulation rate of LGB69 ice core implies its sensitivity to climate change. The above-mentioned results build up a good basis for further research on the reconstruction of temporal variations in air temperature and precipitation and the effects of factors such as solar activity， volcanism on climate change in Antarctica.