In　order　to　dispose　of　the　environmental　pollution　caused　by　fly　ash　and　its　comprehensive　utilization,　fly　ash　was　adopted　as　dominating　material　mixed　with　bond　and　solid　fuel　by　sintering　to　make　fly　ash　ceramsite.　It　is　found　that　application　of　fly　ash　ceramsite　as　filter　medium　in　wastewater　treatment　and　on　treatment　of　wastewater　containing　heavy　metal,　humic,　phosphorus,　fluorin　and　oil　achieves　favorable　results.　Due　to　its　great　specific　surface,　high　surface　energy　and　inner　active　site　of　aluminum　oxide　and　silicon　oxide,　fly　ash　ceramsite　has　excellent　adsorption　ability　and　it　can　be　rebirthed　easily　and　used　repeatedly.　So　it　is　a　kind　of　low-cost　sorbent　and　its　application　in　wastewater　treatment　has　wide　prospect.