  We study the spectra of the doubly charmed tetraquark states in a
diquark-antidiquark model.
  The doubly charmed tetraquark states form an antitriplet and a sextet
configurations according to flavor SU(3) symmetry. For the tetraquark state
$[qq'][\bar c\bar c]$, we show the mass for both bound and excited states. The
two-body decays of tetraquark states $T^{cc}[0^+]$ and $T^{cc}[1^{--}]$ to
charmed mesons have also been studied. In the end,the doubly charmed
tetraquarks decays to a charmed baryon and a light baryon have been studied in
the SU(3) flavor symmetry.
