Abstract: OBJECTIVE To develop a rapid analysis method by fiber-optic sensor for determining galanthamine hydrobromide injection spectrum and content rapidly. METHODS Using fiber-optic sensor process test system,the detector end was dipped into the solution which was from the dilution of the injection, when information related to the samples and dilution multiples was imported into the computer,it could show the scanning map and provide drug content. And compared the consistency of this method with the method in Ch.P（2005）in regard to determination at the same time. RESULTS The method could be instantaneous access to the feature map of the injection and obtain the related parameters. The determination results obtained by this method had no significant difference compared with the method of pharmacopoia of China（P＞0.05）.CONCLUSION The method of analysis by fiber-optic sensor can be used for rapid analysis injection.