Abstract: In conventional digital channelized structure, aside from rabbit-ear effect, there is no simple way to reconstruct the wideband cross-channel signal without distortion. Based on the improved algorithm of signal matched-phase, a wideband signal interception method is presented, where the sub-channels can be seamlessly combined. The method uses signal matched-phase to solve frequency ambiguity in the case of multi-channel undersampled signals. It can reconstruct the wideband cross-channel signal with neither distortion nor rabbit-ear effect. The simulation results show the effectiveness of the presented method.