Abstract: The date-set are managed equally and conformably in the traditional association rule mining algorithm.This paper brings forward a kind of increment association rule mining algorithm：introduce a update association mode with multilevel weighted，the date are endowed with weights during mining algorithm，enhances the effect for the mining result.The refresh date are embodied with higher interest gene for currently decision making.The test indicates the algorithm with high sensitivity responding for the direction and providing a timely and exactly information for the decision-making person.