There　are　currently　many　materials　for　treating　residual　antibiotics　in　the　environment,　but　none　of　them　can　specifically　remove　antibiotics.　In　addition,　these　materials　are　not　sensitive　enough　to　low　concentrations　of　antibiotics.　Here　we　show　that　a　sensitive　and　specific　material　was　developed　by　the　preparation　of　magnetic　Fe3O4-PAMAM-antibody　complexes　for　treating　tetracycline.　The　prepared　antibody　complexes　can　specifically　treat　tetracycline　from　aqueous　solutions　and　the　tetracycline　removal　ability　by　adsorption　was　also　investigated.　Controlled　experiments　were　carried　out　with　the　effects　of　solution　pH,　temperature,　and　initial　concentration　of　the　tetracycline.　The　tetracycline　was　completely　removed　within　35　min　at　room　temperature　30　degrees　C　with　the　maximum　removal　rate　of　almost　100%.　Therefore,　this　material　for　specifically　combining　antigen　and　antibody　to　treat　tetracycline　indicated　good　application　prospects　for　the　waste　water　treatment.