Objective:By comparing the different infiuence to the quantity of volatile coponents in the decoction of Spear Mint

Swallowwort Root

Cinnamoni

Lilac and Cortex Moutan Radicis

which have been gained by three different way（thoes pieces added behind in traditional and earthen pot and Chinese medicine extracting machine

and added innormal way in Chinese medicine extracting machine）in different decocting time pot.The method of extracting volatile components in piecesof chinese medicine in traditional chinese medicine extracting machine has been determined.Method:Decocting volume of volatile components in decoction was determined by HPLC-GC

and the difference of decocting volume of volatile components in different extracting methods are analysised by statistical software SPSS 13.0.Result: There are very signficent differences（P<0.01）on the content of volatile components in different decoctions of having been made by using traditional chinese medicine decoting machine and the traditional decoting tools.However

results of the pieces of traditional chinese medicine which contain volatile components added behind into traditional chinese medicine decoting machine and the regular mean has no apparent differences（P>0.05）.Conclusion: The pieces of traditional chinese medicine composing volatile components could be extrated with other pieces

but it is necessary and scientistic to added behind for extrating those pieces in the regular means.