Taking SiCp/6066Al composite as an example,calculate and analyse influence of interface performance parameters(interface/matrix modulus ratio,interface Poisson ratio and interface volume fraction) and meso-structural parameters(particulate shape,arrangement pattern and dimensional variance mode) on elastic modulus of particulate reinforced aluminium matrix composite.It is proven: Components' performances and interface performances influence elastic modulus of the composite remarkably,meso-structure does not influence obviously.In engineering practice,effect of meso-structure can be negligible.Under the precondition of guaranteeing specific elongation of the composite,the approach that can enhance elastic modulus of the composite at maximum efficiency is to improve interfacial bonding situation of composite.The satisfying result can be obtainable when interface modulus is 20% ~ 30% of matrix modulus.