利用改进ＢＰ网络同时测定了镇咳新药联邦镇咳露中的三组分含量，考察了网络拓扑模型对于分析结果的影响，通过选择合适的网络参数，同时测定模拟样品中的三组分，其中磷酸可待因、扑尔敏和盐酸麻黄碱的平均回收率分别为１００．０３％，１００．１０％和１００．０７％，相对标准偏差分别为０．５４％，０．６５％，０．５１％；与非线性偏最小二乘法结果相比，本文结果更为满意。 The improved BP network was used to simultaneously determine the content of three components in the antitussive dehumidification antitussive. The influence of the network topology model on the analysis results was investigated. The three components in the simulated samples were determined simultaneously by selecting appropriate network parameters The average recoveries of codeine phosphate, chlorpheniramine and ephedrine hydrochloride were 100.03%, 100.10% and 100.07%, respectively, and the relative standard deviations were 0.54%, 0.65% and 0.51 %; Compared with the results of nonlinear partial least squares, the result of this paper is more satisfied.