The Clickstream data is the key to the analysis of Internet users psychological tendency, and the association of the user interesting pages group is hidden in the WEB log. Implied association between Web pages can be achieved by analyzing the click stream data. This paper puts forward a method of mining association page. Associated page searching algorithm adopted a model similarly to the Apriori. This algorithm overcomes some shortcomings of predecessors' association page algorithm can better adapt to the complex Internet environment.