Poly(3,　4-ethylenedioxythiophene)　(PEDOT)　were　synthesized　by　chemical　oxidative　polymerization　and　formed　a　conducting　polymer　electrolyte　in　solid-chip　aluminum　capacitors.　The　influence　of　chemical　polymerization　conditions　on　the　capacitors　was　investigated.　The　results　showed　that　lower　concentration　of　monomer　and　oxidizing　agent,　drying　at　40°C　and　washing　certain　times,　increasing　times　of　dipping　could　improve　the　performance　of　derived　solid　chips　aluminum　capacitors　with　higher　capacitance　and　lower　equivalent　series　resistance　(ESR).