Kirby-Bauer disk agar diffusion method was used to determine the anti-bacterial activities of the bulb extracts from Lilium leucanthum,L.regale and L.davidii toward Staphylococcus aureus,Escherichia coli, Bacillus subtlis and Salmonella,the contents of secondary metabolites were determined by spectrometry,and the correlation analysis was used to ascertain the goal compound.The results showed that the anti-bacterial effect were observed in the lily bulbs extracts of three different species,and the anti-bacte...