Aiming at the problem of anti-radiation UAV target threat assessment with unknown attribute weights and evaluation information in the form of interval dual hesitation fuzzy numbers, a TOPSIS decision method based on the interval dual hesitation fuzzy entropy is studied. The axiomatized definition of interval dual hesitation fuzzy entropy is given, the interval dual hesitation fuzzy entropy formula is used to solve the attribute weights, and the TOPSIS method is used to carry out the threat assessment of the scheme and verified by examples. The results show that this method can increase the scientificity of weights, improve the accuracy of evaluation, and further enrich the fuzzy multi-attribute decision-making theory.