The fatty acid composition of intramuscular fat and subcutaneous fat in Xuanwei ham by GC-MS was studied.The results showed that Xuanwei ham contained 11 kinds of saturated fatty acids(SFA) and 15 kinds of unsaturated fatty acid(UFA).The relative percentage of SFA in intramuscular and subcutaneous fat was 34.75% and 36.23%,respectively.However,the relative percentage of UFA in intramuscular and subcutaneous fat was 6 4.78% and 63.47%,respectively.The main fatty acids in intramuscular fat and subcutaneous fat were oleic acid(C18∶ 1),palmitic acid(C16∶ 0),stearic acid(Cl8∶ 0) and linoleic acid(C18∶ 2).The relative percentages of above fatty acids in intramuscular fat were 33.44%,23.37%,8.44% and 20.55%,respectively.While,the relative percentages of above fatty acids in subcutaneous fat were 31.47%,21.90%,11.13% and 22.39% respectively.