According to the characteristics of limited maintenance time and number of maintenance teams in the maintenance task of aircraft carrier aviation support system in the task interval, a simulation optimization model for optimizing maintenance strategy is established. Based on genetic algorithm, the maintenance task is optimally assigned to the limited maintenance personnel, so as to compress the solution space. The system availability under different maintenance schemes is evaluated by Monte Carlo (MC) simulation method, and the maintenance scheme with the highest availability is determined. The effectiveness of the model is verified by an example, and the influence of the skill proficiency of the maintenance team on the system availability is analyzed. The experimental results show that the model can significantly improve the maintenance capability of the support system.