The influences of σ*and Φ mesons,temperature and coupling constants of nucleons on the moment of inertia of the proto neutron star(PNS)are examined in the framework of relativistic mean field theory for the baryon octet {n,p,∧,∑-,∑0,∑+,Ξ-,Ξ0} system.It is found that,compared with that without consideringσ*and Φ mesons,the moment of inertia decreases.It is also found that the higher the temperature,the larger the incompressibility and symmetry energy coefficient,and the larger the moment of inertia of a PNS.The influence of temperature and coupling constants of the nucleons on the moment of inertia of a PNS is larger than that of the σ*and Φ mesons.