Abstract: Through collecting the search engine user's individual interests, the personalization search technique can analyse the result page and compares with the user's interest, helps the user discover more interested results, thus enhances the search efficiency. Through using the basic structure of ODP, the user carries on the training to establish a basic user interest model, operates the feedback in the model use process through the user's implicit expression, performs the dynamic updating to the user interest model to reflect the user changes unceasingly interest.By using the basic structure of ODP，updating the model with users，search keyword and page browsing and adding weight to the user's different interests，and the user's personalized favorite topics can be clearly expressed.

Key words: personalized search;user interest model;ODP;basic structure of ODP