用石油醚、乙醚、乙酸乙酯、正丁醇等不同有机溶剂分别对经酒精浸泡处理后的合欢荚果浸膏进行萃取。采用滤纸片法对各种萃取物进行6种细菌的抑菌试验。结果表明，各萃取物对试验菌具有选择性的抑制作用。不同溶剂萃取物的抑菌能力不同，其中乙醚萃取物的抑菌能力最强，对金色葡萄球菌的抑菌圈直径达20.3 mm，大肠杆菌和铜绿假单胞菌的抑菌圈直径达14.3 mm和14.0 mm。经逐级萃取后留在水相中的提取物无抑菌能力。

The ethanol extracts from legume of Albizzia julibrissn Durazz were further exacted with different solvents, including petroleum ether, ethyl ether, ethyl acetate and n-butanol. The crude extracts were tested for activities against six species of bacteria of pathogenic bacteria by means of disk agar diffusion method. The results showed that different extracts have selectivity effects on testing microbial. The different solvent extracts of Albizzia julibrissn Durazz have different effects. The activity of ethyl ether extract was the strongest, and (S. aureus,,d=20.3mm. E. coli, d=14.3mm. S. typhi,d=14.0mm) water extract was the weakest.