Abstract:With the traditional method of beam position arrangement for phased array radar, it’s difficult to evaluate Coverage Rate, Repetition Rate, Cumulative Detection Probability of multiple scans and Minimum Scanning Time when beam granularity is arbitrary. In order to solve this problem, this paper analyzed the coupling relationship of beam direction, beam granularity, beam width and dwell time, then proposed a beam section modeling method based on dot-matrix graphic. Thus the two basic models for solving optimization problems of beam position arrangement were built, and the simulation process of optimal beam position arrangement based on genetic algorithm was given, which was validated and applied in specific case later. Through the combination of the two models,the visual simulation and index evaluation of beam position arrangement are realized. Finally, the optimal strategy with less resource waste and high Cumulative Detection Probability is obtained.