The principle of future airspace window shooting system is introduced, and a new projectile dispersion center configuration method, i.e. the diamond distribution method is proposed. The damage probability of airspace window shooting is given, and the effect indexes of the configuration methods are analyzed according to the mean and the uniformity of damage probability. The simulation results show that the diamond distribution method increases the target damage probability and is suitable for configuring the projectile dispersion center of future airspace window.