Through the analysis of the aerial defense equipment maintenance support system in war, the causality and flow figures of system are established, and the confrontation simulation is analyzed by using the software of system dynamics. Considering the targets such as the success percent of enemy airplane repair, the percentage of discarding the damaged aerial defense equipment, the intercept ability of the aerial defense equipment and the percentage of successful maintenance, the system action is simulated and the results shows that the model has some practicability, and can provide a basis for improving the system support efficiency.