To analysis the volatile components in various tissues of Poncirus polyandra,SDS and GC-MS were used to extract and to identify the volatile chemical components.Eighty-six compounds in total were identified from the whole plant volatile.The volatile components and their contents were significantly different in different tissues.The results showed that 21,36,37 and 42 substances were detected by GC/MS in root,stem,leaf and peel,respectively.The 5 same and main compounds were β-caryophyllend,ar-curcumene,α-curcumin,caryophyllene oxide and hexadecanoic acid.The study of the volatile compounds of P. polyandra will provide scientific basis for the protective exploitation and pharmacological utilization of this plant in the future.