Abstract: For the effective elastic moduli (EEM) of composites only the shapes of inclusions and the mechanical properties of matrix and inclusions are considered,and the sizes as well as the interaction of inclusions are discarded by the Eshelby equivalent inclusion method¹, the Budiansky and Wu pelf-consistent method³.The paper takes it into account that the volume fraction of inclusions increases and the interaction of ones is more pro mivent.According to this,EEM of materiais are deduced by considering the shapes,sizes,distribution and interaction of inclusions in the paper.Finally,the distribution of inclusions and the Poisson-ratio of matrix which a fect EEM of composites are given and some results are compared with the ezperirrental data reported in the paper.From the comparison of results, the results of the paper coincide well with the experimental data.