Abstract:The aroma components of raw Pu-erh tea samples obtained from five tea producing areas of Pu'er City were analyzed by headspace solid-phase microextraction-gas chromatography-mass spectrometry （HSSPME-GC-MS）.A total of 83 aroma components were tentatively identified in 42 samples，including 23 alcohols，20 hydrocarbons，12 esters，8 methoxy-phenolic compounds，8 ketones，4 acids，3 phenols，3 aldehydes and 2 nitrogen compounds.There was no significant difference in the relative content of alcohols，hydrocarbons and aldehydes in raw Pu-erh tea samples obtained from different producing areas of Pu'er City.The significant difference proportion of methoxy -phenolic compounds was larger，while the significant difference proportion of esters，ketones，phenols，acids and nitrogen compounds was smaller.Partial least squares discriminant analysis （PLS-DA）was conducted with the relative content of 83 aroma components.The raw Pu-erh tea samples obtained from different producing areas showed a distinct separation trend.The variable importance in the projection （VIP）analysis showed that 33 aroma components played a major role in the differentiation of raw Pu-erh tea samples obtained from different producing areas（VIP ＞ 1），methoxy-phenolic compounds，ketones，esters and alcohols accounted for largest proportion in 33 aroma components.