In　this　paper,　the　micromechanical　finite　element　method　based　on　Representative　Volume　Element　has　been　applied　to　study　and　analyze　the　macro　mechanical　properties　of　the　carbon　black　filled　rubber　composites　by　using　two-dimensional　plane　stress　simulations　and　three-dimensional　axisymmetric　simulations　under　uniaxial　compression　respectively.　The　dependence　of　the　macroscopic　stress-strain　behavior　and　the　effective　elastic　modulus　of　the　composites,　on　particle　shape,　particle　area/volume　fraction　and　particle　stiffness　has　been　investigated　and　discussed.　Additionally,　the　simulation　results　of　the　two-dimensional　plane　stress　model　and　the　three-dimensional　axisymmetric　model　are　evaluated　and　compared　with　the　experimental　data,　which　shows　that　the　two-dimensional　plane　stress　simulations　generate　poor　predictions　on　the　mechanical　behavior　of　the　carbon　black　particle　reinforced　rubber　composites,　while　the　three-dimensional　axisymmetric　simulations　appear　to　give　a　better　prediction.