In order to analyze ARM (anti-radiation missile) to typical phased array radar target destructive effects, the coordination between fuze and warhead is studied. Based on analyzing the characteristics of ARM terminal trajectory and demolition warhead destruction mechanics, destruction model is set up to describe ARM attacking typical target in proximity and contact explosion. Monte-Carlo simulation method is applied to calculate the destructive probability at the optimal detonation height and different mode. The result indicates that proximity mode is fit to target with high antenna, and contact explosion mode is fit to target with low antenna.