Abstract: Initiation, propagation and chain transfer process of B-Palternating copolymerization were studied. We used the extrapolation to get the active center concentration and various kinetic parameters such as k_p , k₁₁, E_p and E_tr etc. We also distingushed two kinds of chain transfer processes i.e. monomer transfer and β-Htransfer and their relative contribution. According to the experimental data the equation for the average degree of polymerization may be expressed as  Finally, the average life time t of living polymer chain was obtained. Using different methods, the accuracy of those methods was discussed.