  The electroweak phase transition is considered in framework of the reduced
minimal 3-3-1 model (RM331). Structure of phase transition in this model is
divided into two periods. The first period is the phase transition SU(3) --->
SU(2) at TeV scale and the second one is SU(2)--> U(1), which is the
like-Standard Model electroweak phase transition. When mass of the neutral
Higgs boson (h_1) is taken to be equal to the LHC value: m_{h_1}=125 GeV, then
these phase transitions are the first order phase transitions, the mass of Z_2
is about 4.8 TeV; and we find the region of parameter space with the first
order phase transition at v_{\rho_0}=246 GeV scale, leading to an effective
potential, where mass of the charged Higgs boson is in range of 4.154 TeV <
m_{h_{++}} < 5.946 TeV. Therefore, with this approach, new bosons are the
triggers of the first order electroweak phase transition with significant
implications for the viability of electroweak baryogenesis scenarios.
