A multi-target discrimination method with monopulse radar is presented in this paper, in which the multiple targets 'parameters are estimated through modified genetic algorithm. A Minimum Description Length ( MDL) criterion is used to detect the number of targets. 本文提出一种基于单脉冲雷达进行多目标分辨的方法,即利用改进的遗传算法对多目标参数进行估计,利用最小描述长度(MDL)准则进行目标数确定。