Abstract: Gradual porous aluminum alloys were prepared by infiltration method.Compression tests were carried out for the porous aluminum alloys with different relative densities.Compressive yield strength and energy absorption properties were investigated.The results show that the compressive stress-strain curves of the alloys consisted of two distinct regions,i.e.,elastic deformation region and plastic collapse region.The relationship between the compressive yield strength and relative density could be described with Ashby-Gibson’s model.The compressive yield strength and energy absorption capability of the alloys gradually increased with relative density increasing.