AHP　method　for　weight　calculation　method,　will　introduce　the　subjective　concept　of　＂experts,　supposed　steps＂,　for　the　objective　result　has　certain　uncertainty,　causes　the　classroom　interaction　data　attribute　weights　proportion　difference　is　not　big,　the　whole　class　achievement　trend　of　convergence,　introduce　the　concept　of　Apriori-AHP.　C4.5　is　used　to　calculate　the　weight　of　attribute　column,　and　then　using　the　Apriori-AHP　algorithm　calculate　attribute　weights,　attribute　importance　weights　on　judgment　performance　indicators　table　overall　consideration,　with　the　weight　of　index　table　of　gifted　student　achievement,　make　the　class　performance　trends　to　fluctuate,　have　tended　to　be　＂standard＂　real　results　for　teacher　reference.