Entanglement, which is considered to be the most nonclassical manifestation of quantum formalism is a valuable resource for quantum computation and quantum information. Here we study entanglement of a channel spin-1 system which can be realised using polarised spin 1/2 beam and polarised spin 1/2 target which naturally arise in nuclear physics ex- periments like hadron scattering and reaction processes. This discussion is best done by em- ploying a new representation for the density matrix which provides physical interpretation for the polarization parameters.