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Aiming at the status that traditional treat assessment model is mainly suitable for fighter jets, according to the operational characteristics of AWACS and enemy tactics, a treat evaluation model for AWACS is proposed. Aiming at the shortcomings of the traditional TOPSIS method that the index weight is determined by man, considering the judgment results of experts based on GD-AHP and the information entropy, the synthesis weights is worked out. Using the improved method, the threat assessment and sequencing of target becoming more objective. The simulation shows that the proposed method is reasonable and effective.