  Motivated by the latest discovery of a new tetraquark $T_{cc}^+$ with two
charm quarks and two light antiquarks by LHCb Collaboration, we investigated
the $DD^*$ hadronic molecule interpretation of $T_{cc}^+$. By calculation, the
mass and the decay width of this new structure $T_{cc}^+$ can be understood in
one-meson exchange potential model. The binding energies for these $DD^*$
hadronic molecules with $J^P=1^+$ are around $1MeV$. Besides, we also studied
the possible beauty-partners $T_{bb}(10598)$ of hadronic molecule $T^+_{cc}$,
which may be feasible in future LHCb experiments.
