Eight compounds were isolated from the ethanol extracts of the stems of Hibiscus hamabo Sieb. et Zucc. from Qingzhu Farm in Haining County of Zhejiang Province. They are friedelin （1）， 3β-friedelinol （2）， 3α-hydroxy friedel-2-one （3）， 3α-hydroxy friedel-3-en-2-one （4）， oleanic acid （5）， β-sitosterol （6）， β-daucosterol （7） and stigmasterol （8）, respectively. All of them are isolated firstly from H. hamabo， and compound 1， 4， 5， 6 and 8 have anti-tumor and anti-cell proliferation effects.