Abstract: Metal-particle-dispersed piezoceramics are a new type of 3-0 piezoelectric composite.The volume fraction of metal particles has large effect on the piezoelectric properties of the composite.In combination with that metal particle dispersion can result in a change in orientation distribution of the electric domain in piezoceramics,the influence of the volume fraction of metal particles on the piezoelectric properties of the composite was calculated according to the effective medium theory based on Green's function.It is shown that the effective piezoelectric properties of the composite decline with the volume fraction of metal particles increasing.The theoretical calculations are basically consistent with reported experimental results,indicating that this method enables us to accurately forecast the relationship between the structure and properties of the piezoceramics/metal composite.