Objective To optimize the best producing area of Mangnolia officinalis.Methods The content in Mangnolia officina⁃lis of producing area was determined by HPLC.Results The content of magnolol and honokiol in Mangnolia officinalis of different origins from high to lowwas as follows:Daoxian of Hunan,Enshi of Hubei>Zhangjiajie of Hunan,Shennongjia of Hubei>Yaan of Sichuan,Xishui of Guizhou>Lushan of Jiangxi,Zhangshu of Jiangxi>Lishui of Zhejiang,Nanping of Fujian.Conclusion Ex⁃perimental data were prov...