  Considering the CP violating phases, we analyze the neutron electric dipole
moment (EDM) in a CP violating supersymmetric extension of the standard model
where baryon and lepton numbers are local gauge symmetries(BLMSSM). The
contributions from the one loop diagrams and the Weinberg operators are taken
into account. Adopting some assumptions on the relevant parameter space, we
give the numerical results analysis. The numerical results for neutron EDM can
reach $1.05\times 10^{-25}(e.cm)$, which is about the experimental upper limit.
