Abstract: TCTGC/MS was used to analyze the ingredients of volatile organic compounds(VOCs) of 4 typical plant communities of Zijinshan Mountain in Nanjing, We totally detected 7 compositions,including terpenes, alcohols, ketones, aldehydes, esters, alkanes and phenols. The main volatile constituents in spring and summer were the terpenes and the alcohols, their average relative contents were 2865 %, 3851 % respectively; the main volatile constituents in autumn and winter was the alkanes.Its average relative content accounted for 5118 % of the volatile mass quantity. The relative contents of the other VOCs were low. The order of relative contents of terpenes, alcohols and esters in different seasons were as follows:summer> spring>autumn>winter, and the order of relative content of alkanes in different seasons was winter>autumn>spring >summer. However, the regularity for change of the other VOCs was different in different communities. The relative content of terpenes of Liquidambar formosana+ Acer buergerianum community was the highest in spatial, and its relative contents was 4027 %, the next was Pinus massoniana + L. formosana community(3136 %), Quercus acutissima + Q. variabilis community (2517 %),P. massoniana + Q. acutissima community(1801 %); The relative contents of alcohols of P. massoniana+ L. formosana community was the highest in summer and autumn, and its relative content was 4392 %, whereas in winter and spring, the relative contents of alcohols of P. massoniana + Q. acutissimacommunity was the highest, and its relative content was 3125 %.