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) → SU (2) at the TeV scale and SU (2) → U (1) at the 100 GeV scale. The EWPT SU (3) → 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 -10 3 GeV. The EWPT SU (2) → 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 ± 2 and Y ± are in the ranges 10-10 2 GeV. The contributions of H 0 1 and H ± 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.
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