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Abstract We investigate the two-body non-leptonic decays of doubly charm strange, $$\Omega _{cc}^{+}$$ Ωcc+ , baryon. The branching ratios of the $$\Omega _{cc}^{+}$$ Ωcc+ baryon decays involving a pseudoscalar meson for CKM-favored and -suppressed modes are determined by employing the pole model and the factorization hypothesis. We give the first estimates of the non-factorizable W-exchange contributions of $$\Omega _{cc}^{+}$$ Ωcc+ decay in the pole model. We find that the branching ratios of some decays receive contributions, exclusively from the W-exchange diagrams, are as large as $$\sim \mathcal {O}(10^{-2})$$ ∼O(10-2) . The non-spectator contributions in doubly charmed decays are comparable to the factorizable contributions in most of the cases.