Multi-expert evaluation, as a traditional and effective method to evaluate the anti-jamming capability of radar systems, has the disadvantages of inaccurate evaluation caused by differences of expert levels and individual preferences. In this paper, by combining Analytic Hierarchy Process(AHP) with Principal Component Analysis(PCA), an AHP-PCA method is proposed to ensure the consistency of multi-expert group decision-making. The comprehensive results about the anti-jamming capability of the seeker system in the same environment are obtained through the application of AHP-PCA to the anti-jamming capability evaluation of radar seekers. Then the consistency of the group decision on the comprehensive evaluation results is described quantitatively. The evidences suggest that the AHP-PCA method can reduce the impact of evaluation inaccuracy and the subjectivity of evaluation caused by different preferences of experts, and that AHP-PCA is of engineering application value.