Abstract:In order to better grasp the learning state of the distance education students, the nonlinear fitting algorithm is introduced into the Approach-Withdrawal model construction about the distance education learning interest, and a kind of the algorithm about the distance education learning interest Approach-Withdrawal is put forward based on Guass-Newton method. Based on the measured face area and learning interest measure, the empirical analysis finds that the algorithm can better fit into the two values of face area and learning interest in Approach-Withdrawal, and the error approximates the ideal range