  In this paper, we employ gauge/gravity duality to investigate the string
breaking and melting of doubly-heavy tetraquark that includes two heavy quarks
and two light antiquarks in a holographic model at finite temperature. Firstly,
we investigate four configurations of $\rm{QQ\bar{q}\bar{q}}$ in the confined
phase and consider different separation distances of the heavy quarks at
varying temperatures. At high temperature, $\rm{QQ\bar{q}\bar{q}}$ melts at
certain distances and the confined quarks are released. As the temperature
continues to increase, some configurations of doubly-heavy tetraquark can not
exist. Furthermore, we investigate three decay modes of $\rm{QQ\bar{q}\bar{q}}$
and compare the potential energy of $\rm{QQ\bar{q}\bar{q}}$ with that of
$\rm{QQq}$ at finite temperature .
