The identification of radiation source threat level is an important basis for interference resource allocation. Currently, the commonly used threat level judgment methods in engineering only consider a single method for indicator weighting, which has strong subjective factors and often results in unreasonable results. In response to the above issues, this article proposes a subjective and objective comprehensive weight threat level identification method based on game theory. This method utilizes four threat indicators, namely carrier frequency, pulse width, pulse repetition period and duty cycle, to establish corresponding membership functions. Using the ideas of game theory, the weights obtained from tomography analysis and entropy method are combined to obtain comprehensive weights; combining weight with membership degree, the threat level recognition results are obtained. This article analyzes the parameters of radar radiation sources in multi-environment battlefields, and the results show that using a threat level evaluation method based on game theory can provide more reasonable results compared to using only a single evaluation method, achieving good recognition results for multi-radiation source scenes.