  The significance of discovering the boson of 750 GeV is beyond finding a
single heavy boson, because it may hint the location of the scale for new
physics beyond the standard model which is the target of long-time exploration.
There have been many models to explain the diphoton excess observed by the
ATLAS and CMS collaborations and the BLMSSM is one of them. The BLMSSM is an
extension of the minimal supersymmetric model where baryon and lepton numbers
are local gauge symmetries. We analyze the decay channels $\Phi\rightarrow gg$,
$\Phi\rightarrow\gamma\gamma$, $\Phi\rightarrow Z\gamma$, and $\Phi\rightarrow
\bar{t}t,\;VV\;(V=Z,\;W)$ with the mass of the CP-odd scalar $\Phi=A_{_B}^0$
being around $750\;{\rm GeV}$ in this model. Within a certain parameter space,
the scenario can account for the experimental data on the diphoton excess.
