Two　protocols　of　quantum　direct　communication　with　authentication　[Phys.　Rev.　A　73:042305,　2006]　were　recently　proposed　by　Lee,　Lim　and　Yang,　based　on　the　correlation　of　Greenberger-Horne-Zeilinger　(GHZ)　states.　However,　Zhang　et　al.　showed　that　in　the　two　protocols　the　authenticator　Trent　can　eavesdrop　the　secret　message　by　subtle　strategies　[Phys.　Rev.　A　75:026301,　2007].　In　this　paper,　we　propose　two　authenticated　quantum　direct　communication　(AQDC)　protocols　using　Bell　states.　Users　can　identify　each　other　by　checking　the　correlation　of　Bell　states.　Alice　can　directly　send　a　secret　message　to　Bob　without　any　previously　shared　secret　using　the　remaining　Bell　states　after　authentication.　The　two　proposed　AQDC　protocols　are　implemented　under　the　condition　that　there　is　a　quantum　link　between　Alice　and　Bob　and　that　there　is　no　quantum　link　between　Alice　and　Bob　respectively,　similar　to　the　ones　proposed　by　Lee,　Lim　and　Yang　[Phys.　Rev.　A　73:042305,　2006].　The　proposed　AQDC　protocols　not　only　fix　the　leaks　in　the　AQDC　protocols　proposed　by　Lee,　Lim　and　Yang,　but　also　economize　the　quantum　resource.