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The key technology of realizing synthetic aperture radar (SAR) imaging is real-time processing of echo signal and a lot of data memory. However, it is very difficult to finish the work of SAR imaging system with single DSP chip. In order to resolve those problems, the DSP parallel processing system was designed, ADSP2106x is a high-speed and real-time digital signal processor that was produced by AD Company. Using the Links port of ADSP2106x, the DSP parallel processing structure was devised. In the meantime, SAR imaging processing structure and the performance and characteristics of ADSP2106x were introduced, besides, the advantages and disadvantages of these methods were described. DSP parallel processing system can satisfy the real-time requirement of the SAR imaging signal processing and has widely applied expectation in radar, communication and image processing etc fields.