Formed CuO-Ce0.5Mn0.5O2 supports were prepared by extrusion process using CuO-Ce0.5Mn0.5O2 powder as raw material．The influence of the kinds of peptizers，the calcination temperature，calcination time on the formed supports were investigated,and these supports were characterized by crushing strength test，BET and SEM methods.The results show:all the peptizers can improve the crushing strength of the formed CuO-Ce0.5Mn0.5O2 supports;however, peptizers have little effect on the surface area of the supports. The added citric acid can remarkably increase the crushing strength of the formed CuO-Ce0.5Mn0.5O2 supports.Under the preparation conditions of nitric acid mass fraction of 3%,citric acid /binder mass ratio of 4:6,calcination temperature of 600 ℃ and calcination time of 5h,the crushing strength，surface area and pore volume of the formed CuO-Ce0.5Mn0.5O2 supports can reach 98.65 N/cm,36.938 rn3/g and 0.177 cm3/g,respectively. The corresponding catalyst supported by Pd for direct synthesis of diphenyl carbonate(DPC) had better catalytic activity，and the yield of DPC could achieve 9.91% under Pd loading content (mass fraction) 0.5%, p=5 MPa,p(CO)∶p(O2)= 94∶6, reaction time 4h, reaction temperature 65 ℃