The actual combat training is an effective means to check the response of radar countermeasure troops to the complex electromagnetic environment sand exercise the full combat capability of combat equipments. First, the training evaluation process and relevant comprehensive evaluation index system covering major aspects of radar countermeasure training are established in the paper. Second, according to the relationship between training effect evaluation requirements and electromagnetic environment complexity, a complexity influence factor is proposed to weigh the influence degree of complex electromagnetic environment on training effect. Finally, an weighted training effect evaluation algorithm based on analytic hierarchy process is established, which can be used to evaluate the radar countermeasure training effect in complex electromagnetic environment, and measure the troops’ training scores on consistent scale of electromagnetic environment. The research can provide reference for organization of radar countermeasure training or training effect evaluation system design.