The statistical characteristics of Zr-based metallic glass reinforced porous W matrix composite are extracted using two-point probability functions. And representative volume elements (RVE) of the composite are reconstructed. The results show that the micro-structural geometric structure characteristics can be described satisfactorily and the theoretical foundation of macro isotropy of materials is approved. Though the RVEs have the same geometric characteristics with original composites, RVEs are only 2.2% in the size of original SEM picture. Which can increases the efficiency of finite element analysis. A strong tool is developed for the research of Zr-based metallic glass reinforced porous W matrix composite by this work.