zNoseTM possesses the following advantages including short sampling time, rapid analysis and portability compared with conventional analytical method. We analyzed sychronously the volatiles emitted from tea plants damaged by Ectropis obliqua Prout larvae with GC-MS and zNoseTM, and the emission of the green leaf volatiles（4-methyl-3-pentenal，（Z）-3-hexen-1-ol，(Z)-3-hexenly acetate） produced by tea leaves after mechanical damage were analyzed with zNoseTM. The qualitative analysis of the volatiles emitted from tea plants infested by Ectropis obliqua Prout with GC-MS or zNoseTM showed the similar results, however the relative contents of (Z)-3-hexen-1-ol，benzyl nitrile，indole，（E）-caryophyllene obtained from both showed a certain difference. A further investigation with by zNoseTM showed that more damage level resulted in the more emission of green leaf volatiles when young leaves were damaged mechanically with needle (sting) or abrasive paper (scratch); the emission of green leaf volatiles induced by the same degree mechanical damage from old leaves and young leaves was different; and the emission peak of 4-methyl-3-pentenal，（Z）-3-hexen-1-ol and (Z)-3-hexenyl acetate appeared at different time after young leaves were stung. Finally, the prospect on the application of zNoseTM in plant volatiles analysis were discussed.