Due to its internal atoms bond together covalently and metal binding, intermetallic porous material combines advantages over the ceramics and metals, and becomes an excellent functional material and a high-temperature high-strength lightweight structural material, which has potential applications on aspects of filtration, welding, purification and biological materials, therefore it is important study on its mechanical properties that rarely has been reported previously at home and abroad currently. The project intends to establish the theoretical model of intermetallic porous material and obtain the theoretical formula of macroscopic elastic constants by macroscopic-mesoscopic analysis, furthermore, the correctness of the formula are verified through mechanical tests and its deformation mechanisms and microscopic fracture mechanism are explored. Meanwhile, the random model is constructed by self-made calculation program, then uniaxial tensile is developed to analyze the mechanical properties though the secondary development platform of the FEA and the influence law of porosity and pore structure on macroscopic elastic properties is revealed, which provide important theoretical basis on development and application of this new intermetallic porous materials.