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Aircraft in the air-ground communication, the channel will exist in a large number of nonlinear disturbance signal, cause communication signals change robustness. Put forward a kind of aviation communication based on information maximization algorithm robustness under the interference of communication methods. Communication model is established according to the characteristics of the aviation communication, using the method of average treatment and bleaching treatment method for signal preprocessing, the use of information maximization algorithm of signal separation letter bath, implements the aviation communication signal robustness requirement. On Matlab7.0 platform to complete the test, the experiment in aviation communication divided into two cases:external interference can be ignored and the external disturbance should not be neglected. Simulation time was 3 000 seconds, interference sources number 12, the experimental results show that using the algorithm of the original signal fitting rate of about 97%, robustness, average error is about 3%, and the traditional algorithm error is above 10%, show that this algorithm is stronger robustness of signals.