Abstract:Objective: To promote its comprehensive utilization,the involatile constituents of Mentha haplocalyx were studied systematically.Method: The chemical components were isolated and purified by silca gel column chromatography and recrystallization.The chemical structures were elucidated on the basis of physico-chemical properties and spectral data.Result: Eight compounds were isolated and identified as: acacetin(Ⅰ),tilianine(Ⅱ),linarin(Ⅲ),n-butyl-β-D-fructopyranoside(Ⅳ),ursolic acid(Ⅴ),oleanolic acid(Ⅵ),β-sitosterol(Ⅶ),daucosterol(Ⅷ).Conclusion: Compounds Ⅰ~Ⅴ were obtained from this plant for the first time.