  We study the phase transition and the critical behavior of the BTZ black hole
with torsion obtained in $(1+2)$-dimensional Poincar\'{e} gauge theory.
According to Ehrenfest's classification, when the parameters in the theory are
arranged properly the BTZ black hole with torsion may posses the second order
phase transition which is also a smaller mass/larger mass black hole phase
transition. Nevertheless, the critical behavior is different from the one in
the van der Waals liquid/gas system. We also calculated the critical exponents
of the relevant thermodynamic quantities, which are the same as the ones
obtained in the Ho\v{r}ava-Lifshitz black hole and the Born-Infeld black hole.
