Abstract: The application of phased array technology is widely more and more in ECM field,currently the common phased array jammer can work that is guided by ESM device, and realize tasks of HGESM & HPECM,but It has certain limitations. The architecture and the feature and existed problem of common phased array jammer is analysed, draw on the experience of digital array radar architecture, a kind of architecture of full digital array jammer is proposed, and the jammer architecture and system form and function realization and key technology is analysed, finally existed problem of project application and follow-up improvement direction about the architecture is pointed out.