Abstract: In the process of guidance radar tests evaluation, there are many technical state of radar. It is an important work to analyze the adaptability of various types of technical state under the specific conditions in guidance radar tests evaluation process. Usually, it uses single factor adjusted method to analyze adaptability. But it's hard to describe the relationship between factor and performance and dynamic change of the technical state. Aimed to shortcomings of this method, it introduces an idea of “relative efficiency”, and the factor effect calculation method based on DEA and Malmquist index model is proposed. It studies the adaptability of much technical state to specific conditions in the radar test evaluation process, and taking into account the dynamic change nature of technical state. It is a non-parametric method, and it does not need to establish the relationship between factor and performance. According to the actual background and characteristics of test evaluation problem, this method is easy to model, calculate simply. First, the DEA Malmquist index theory is showed. According to the radar test evaluation actual characteristics, the calculation steps and technical details are discussed. At last, Simulation example analysis validate the rationality and correctness of this method, the conclusions have certain significance to practical work.