Abstract: Displaced phase center antenna (DPCA) is an effective method to achieve highresolution and wide swath, which has been widely applied in highperformance synthetic aperture radar (SAR) systems. In order to achieve optimum performance, DPCA radar system needs to meet the azimuth uniform sampling conditions, or it may cause azimuth non-uniform sampling of the SAR system, and the usage of conventional SAR imaging method will lead to serious azimuth ambiguity. According to the sparse signal processing theory, this paper presents a multi-channel DPCA imaging method with non-uniform sampling based on complex approximate message passing (CAMP) algorithm. The presented method can effectively solve the problem of azimuth ambiguity and clutter interference caused by non-uniform sampling of the multi-channel SAR system, and achieve the highprecision reconstruction of the observation scene. Experiments based on simulated and real data verify the effectiveness of the proposed method.