In order to improve the shooting probability of antiaircraft artillery, put forward the assistant decision method for optimal fire time. According to antiaircraft artillery shooting features to air mobile target, analyze factors which decide optimal fire time of antiaircraft artillery. Use firing decision parameter as assistant decision reason, and put forward methods and process. Take 57 antiaircraft artillery and certain type multi-barrels 25 antiaircraft artillery as example, carry out example simulation analysis. The analysis result indicates that the method is accord with fact