Concrete　with　medium　or　high　volume　Class　I　and　Class　III　fly　ash　was　designed　according　to　the　activity　of　fly　ash,　and　the　7,　28,　90　d　compressive　strength,　the　anti-chloride　ion　permeability　and　the　anticorrosion　behavior　of　concrete　were　tested.　The　test　results　show　that　the　compressive　strength,　the　anti-chloride　ion　permeability　and　the　anticorrosion　behavior　of　the　Class　III　fly　ash　concrete　are　not　notably　lower　than　that　of　the　Class　I　fly　ash　concrete,　and　the　evaluating　system　of　fly　ash　needs　to　be　improved.