Abstract: The poor electromagnetic environment and the large amount of traffic to be transmitted in the aviation cluster combat scenario have led to an increasingly tight spectrum of data link resources. In response to the above problems, the NOMA technology is used to improve the data link spectrum utilization and analyze the performance of the data link system based on the NOMA technology under interference conditions. Firstly, an aviation data link system model based on NOMA technology was established based on the characteristics of the aviation cluster combat scenario, and the expression that the system can obtain the maximum rate was derived. Secondly, considering the effects of path loss and Rice fading, a closed expression for the probability of system outage is derived, which provides a fast and effective method for estimating system performance. Simulation results verify the accuracy of the theoretical derivation formula, and further analyze the effects of factors such as signal transmission power, transmission distance, enemy interference, and data rate on system performance.