The　pseudo-ternary　phase　diagram　of　methyl　methacrylate　(MMA)/acrylic　acid　(AA)/sodium　dodecyl　sulfate　(SDS)/water　system　was　figured　out.　The　single-phase　region　was　partitioned　into　inverse,　bicontinuous　and　direct　microemulsion　areas　with　conductivity　measurements.　The　polymerization　in　the　inverse　microemulsions　was　initiated　by　azobisisobutyronitrile　(AIBN)　and　microporous　polymer　was　obtained.　The　kinetic　study　of　the　inverse　microemulsion　polymerization　was　further　carried　out　and　the　concept　of　biphase　polymerization　was　introduced.　The　effects　of　the　amount　of　initiator,　the　content　of　AA,　the　content　of　SDS　aqueous　solution　and　reaction　temperature　on　the　polymerization　rate　at　5%　conversion　were　investigated,　and　the　following　relation　was　obtained;　dC/dt　∞　[AIBN]0.8[AA]1.2[W]0.7　The　exponent　expressing　dependence　on　initiator　was　0.8,　which　meant　that　monoradical　termination　was　perhaps　the　dominant　termination　manner.　In　addition,　the　apparent　total　active　energy　of　the　inverse　microemulsion　polymerization　was　93.8　kJ/mol.