The invention discloses an interest mining method for user browsing behaviors. For users u1,u2 and u3, within an appointed time, the user u1 accesses tags t1, t2 and t3, the user u2 accesses tags t2, and the user t3 accesses tags t2 and t3. The method comprises the following steps: (1), certain typical websites inside each interest label are labeled, and the default of weight of interest corresponding to the labeled websites tag->interest is 1.0; (2), according two graph models established between users and website tags accessed by users within an appointed time and through n turns of random walk, wherein n refers to positive integers, the results of n turns of random walk are collected, and the weight of user-> tag can be calculated; (3), user->interest is obtained through the product of the user->tag obtained in the step (2) and the user->interest obtained in the step (3), and user->interest refers to a confidence coefficient of each user to the interest tag; (4), a threshold value a is arranged, and when the confidence coefficient of the user->interest is larger than a, the interest tag for the user is predicted.