Objective:To study the chemical constituent from the ethyl acetate extract parts of Qinzhu Siwu Tang. Method: The compounds were isolated by column chromatography with silica gel and gel permeation chromatography. The structures were determined on the basis of physicochemical properties and spectroscopic analysis. Result: 14 compounds were isolated and identified as tripalmitin ( 1 )

2(S)-5

7-dihydroxy-6-methoxyflavanone ( 2 )

β-sitosterol ( 3 )

wogonin ( 4 )

chrysin ( 5 )

benzoic acid ( 6 )

atractylenolide-Ⅲ( 7 )

trans-ferulic acid ( 8 )

formononetin ( 9 )

baicalein ( 10 )

5

7

3'

6'-tetramethoxy-8

2'-dimethoxyflavone ( 11 )

2'

3

5

6'

7-pxy-entahydroflavanone ( 12 )

5

7

2'

6'-tetrahy-droxy flavones ( 13 )

gallic acid ( 14 ). Conclusion: All the compounds are isolated from Qinzhu Siwu Tang for the first time.