A　new　method　of　analog　IC　fault　diagnosis　is　proposed　in　this　paper,　which　is　based　on　wavelet　neural　network　ensemble　(WNNE)　technique　and　Adaboost　algorithm.　This　makes　the　way　of　the　directory　be　of　use　in　fault,　and　enhances　the　validity　of　the　fault　diagnosis.　Using　wavelet　decomposition　as　a　tool　for　extracting　feature,　Then,　after　training　the　WNNE　by　faulty　feature　vectors,　the　fault　diagnosis　of　a　radar　scanning　circuit　is　implemented　with　this　new.　method.　The　simulation　results　show　that　the　new　method　is　more　effective　than　the　traditional　wavelet　neural　network　(WNN)　method.