Porous　alumina　ceramics　are　widely　used　in　various　fields　because　of　their　unique　characteristics　in　structure　and　properties.This　article　mainly　provided　an　overview　of　preparation　techniques　of　porous　alumina　ceramics;besides,the　principles　and　the　characteristics　of　pore-forming　agents　processes,gel-casting　processes,freeze-casting　processes,anodizing　processes　and　other　common　processes　in　obtaining　the　required　properties　of　porous　alumina　ceramics　were　introduced.Meanwhile,the　relevant　applications　and　the　performance　of　porous　alumina　ceramics　were　described.The　research　prospects　of　porous　alumina　ceramics　were　put　forward　based　on　the　research　status　at　the　end　of　this　paper.