  We consider the EWPT in the economical 3-3-1 (E331) model. Our analysis shows
that the EWPT in the model is a sequence of two first-order phase transitions,
$SU(3) \rightarrow SU(2)$ at the TeV scale and $SU(2) \rightarrow U(1)$ at the
$100$ GeV scale. The EWPT $SU(3) \rightarrow SU(2)$ is triggered by the new
bosons and the exotic quarks; its strength is about $1 - 13$ if the mass ranges
of these new particles are $10^2 \,\mathrm{GeV} - 10^3 \,\mathrm{GeV}$. The
EWPT $SU(2) \rightarrow U(1)$ is strengthened by only the new bosons; its
strength is about $1 - 1.15$ if the mass parts of $H^0_1$, $H^\pm_2$ and
$Y^\pm$ are in the ranges $10 \,\mathrm{GeV} - 10^2 \,\mathrm{GeV}$. The
contributions of $H^0_1$ and $H^{\pm}_2$ to the strengths of both EWPTs may
make them sufficiently strong to provide large deviations from thermal
equilibrium and B violation necessary for baryogenesis.
