It has become clear that the combination of digital waveform encoding on transmit with digital beamforming on receive has the potential of significantly improving the capabilities and the performance of fu-ture SAR systems and missions.In this paper,the digital array synthetic aperture radar(SAR)evolution and its research development are reviewed,including classical application modes and superior performances.At last,we make suggestion that the research on the wideband digital array SAR/MTI system technology should be made to promote the SAR reconnaissance and surveillance technology of digital array system in our coun-try,so as to lay the ground for the next generation of battlefield surveillance radar technology,realizing pow-erful promotion of intelligence acquisition efficiency.%合成孔径雷达作为一种无线电装备，也必然遵循从模拟到数字再到软件化这样的发展道路。数字阵列 SAR/MTI系统采用数字化、软件化处理取代硬件实现，具有许多常规 SAR/MTI系统所不具备的优势。回顾了数字波束形成技术（DBF）与合成孔径雷达（SAR）逐步结合的技术发展进程，讨论DBF在SAR系统的典型应用模式及性能与功能的提升。最后建议我国急需开展宽带 DBF体制 SAR/MTI系统技术研究，使DBF体制的 SAR侦察监视技术从跟踪走向创新，从而为下一代战场侦察监视雷达奠定技术基础，实现情报获取效率的有力提升。
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