A one-pot and two-step process in the case of microwave irradiation was used to fabricate polyvinyl alcohol polymer sponge (PVA polymer sponge) and polyvinyl alcohol/phytic acid polymer sponge (PVA/PA polymer sponge). The characterization of them showed that the ether bonds made linear PVA molecules weave a stacked two-dimensional structure in PVA polymer sponge, and the ether bonds and phosphonate bonds made the linear PVA molecules and cricoid PA molecules weave three-dimensional structure in PVA/PA polymer sponge, which owned the polyporus morphology. The investigations for thermal stability, surface resistivity and self-extinguishing time exhibited that they apart reached 235.5 and 354.8 degrees C and 5.40x10(9) and 1.63x10(5)ohm/sq and 18.00 and 9.00s.