The　dynamic　fatigue　process　of　alumina　ceramics　synthesized　from　waste　alumina　slag　was　monitored　using　the　method　of　asymmetric　sine　wave　dynamic　load　variation.　The　damage　parameter　defined　by　the　method　of　system　analysis　is　used　as　major　evaluation　indexes,　and　both　crystal　structure　and　microstructure　are　utilized　to　discuss　the　factors　affecting　the　fatigue　characteristics　of　alumina　ceramics.　The　most　suitable　content　of　binder　was　then　determined.　The　results　show　that　the　liquid　phase　content　is　the　key　factor　to　influence　the　fatigue　damage　life　of　alumina　ceramics.　The　longest　crack　initiation　life　is　225000　cycles　for　specimen　with　clay　binder　of　18%,　corresponding　with　20%　liquid　phase,　75%　alumina　phase.