  We analyze the recent diphoton signal reported by ATLAS and CMS
collaborations in the context of the $SU(3)_{C}\otimes SU(3)_{L}\otimes
U(1)_{X}$ anomaly free models, with a 750 GeV scalar candidate which can decay
into two photons. These models may explain the 750GeV signal by means of one
loop decays to $\gamma\gamma$ through charged vector and Higgs bosons, as well
as top-, bottom- and electron-like exotic particles that arise naturally from
the condition of anomaly cancellations of the $SU(3)_{C}\otimes
SU(3)_{L}\otimes U(1)_{X}$ models.
