For solving the problem of attribute weights are greatly affected by subjective factors and high maneuvering targets in the target threat evaluation, an improve multi-attribute decision target threat evaluation method was proposed. By combing the fuzzy theory with multi attribute decision rules, membership functions were constructed to normalize the attribute values and weights of attribute were calculated by entropy method. Then target threat evaluation was carried out by using TOPSIS rules and different situation instance examples were established. Use static numerical calculation and dynamic simulation method to verify method. The simulation experiment results proved the proposed method is reasonable and effective.