We give a systematic study of B c → B n V decays, where B c and B n correspond to the antitriplet charmed and octet baryons, respectively, while V stand for the vector mesons. We calculate the color-symmetric contributions to the decays from the effective Hamiltonian with the factorization approach and extract the anti-symmetric ones based on the experimental measurements and SU (3) F flavor symmetry. We find that most of the existing experimental data for B c → B n V are consistent with our fitting results. We present all the branching ratios of the Cabbibo allowed, singly Cabbibo suppressed and doubly Cabbibo suppressed decays of B c → B n V . The decay parameters for the daughter baryons and mesons in B c → B n V are also evaluated. In particular, we point out that the Cabbibo allowed decays of Λ + c → Λ 0 ρ + and Ξ 0 c → Ξ − ρ + as well as the singly Cabbibo suppressed ones of Λ + c → Λ 0 K * + , Ξ + c → Σ + φ and Ξ 0 c → Ξ − K * + have large branching ratios and decay parameters with small uncertainties, which can be tested by the experimental searches at the charm facilities.