Abstract: The reason of blocking jamming in-band is that the useful signals are buried in interfering signals and can not be detected due to adaptive gain adjustment of some kind receiver. In order to predict the survivability of frequency equipment in battlefield environment, a prediction model was deduced for the dual-frequency interference condition, taking the useful signal gain as standard and adapting the working principle of the general receiver. Taking a certain type of communication station as an example and the bit error rate as the criterion of interference, a single-product sensitivity test method and a dual-frequency interference sensitivity test method were developed for a communication station. The correctness of the interference prediction model was verified with the test data.