Cross-eye jamming is a kind of coherent jamming, which can effectively interfere with monopulse radar in angle measurement. On the basis of discussing the principle of cross-eye jamming technology, we deduce the calculation steps of using three jammers to generate spatial phantom targets, and simulate the jamming technology in combination with a practical application scenario. The simulation result shows that this jamming technology can generate phantom tracks in three-dimensional space and effectively interfere with monopulse radar.