Abstract: Multiple false target jamming is becoming increasingly the focus of attention as one of important means of deceive jamming for its simple technology and marked jamming effectiveness. In this paper the technology of multiple false target jamming is introduced, the index factors of effectiveness evaluation such as threaten level tactor, RF and PRF agility tactor, tactics tactor and simulation fidelity tactor are described, then the standardized model of the number of multiple false target is built and its operational effectiveness is evaluated by the probability model of single-target being hit while penetrating and the target number model of breaking through successfully. With the help of simulation and some test data from other countries, the rationality of these models is demonstated.