Abstract: Angle track association for midcourse-complex is a core issue for Space Tracking and Surveillance System. The common used method is based on hinge angle difference constraint which only utilizes the geometric constraint between targets and observers. It obtains a poor performance for midcourse-complex. This paper proposed an angel track association algorithm for midcourse-complex using dynamic characteristics constraint. Firstly, dynamic model and measurement model of midcourse-complex are presented. Then, using likelihood function of midcourse-complex as the assignment cost, a 2 dimensional assignment algorithm is used for angel track association. Performance has been evaluated through Monte Carlo simulations from 3 aspects including length of angle track, line-of-sight error and distance between warhead and decoys. Results illustrate the effectiveness of this proposed method.