How to carry out website operation management effectively is one of the research hotspots in IT industry. In this paper, a novel research framework based on data mining as the main method is proposed for the website management in the big data background. Through real-time monitoring of the abnormal fluctuation of data and timely identification of effective information, the purpose of core information mining can be achieved. Experimental results show that the algorithm can accomplish significant event mining effectively, and guarantee real-time online processing requirements both in speed and accuracy, to achieve the purpose of providing a reliable reference basis for the efficient operation of website.