Abstract: Based on the principle of racemization degree of amino acids in fossil increasing with its age, this paper has estimated the ages of fossil bones, teeth and shells fron some Quaternary cave deposits in Juyuandong cave (early pleistocene), Bijiashan cave (middle pleistocene), Bailiangdong cave, Dalongtan rockshelter (late Pleistocene to Holocene) in Liuzhou, Zengpiyan rockshelter (holocene) in Guilin, Guangxi. The results are basically consistent with 14C ages or have been supported by other geological evidences.

Key words: Amino acid geologic age; Quaternary fossil; Guangxi