Abstract: Aiming at the demand for high performance, high efficiency and high flexibility of signal processing under the condition of multifunctional integration of distributed opportunistic array radar, a mimic signal processing method is proposed based on the mimic computing technology. The computing grain abstract, component implementation, interconnection structure, storage structure and the processing flow are designed, and a mimic signal processing verification system is built on an alternative computing platform composed of field programmable gate array, digital signal processing, and PowerPC. Based on the typical distributed opportunistic array radar working modes, such as space-time adaptive processing, pulsed Doppler, and strabismus synthetic aperture radar imaging, the performance, flexibility, calculation accuracy and conversion efficiency of the mimic signal processing method are fully verified. The verification results show that the mimic signal processing method can effectively improve the signal processing performance, and at the same time, it can obtain the high flexibility of signal processing under multiple operating modes of the distributed opportunistic array radar.