Abstract: In Synthetic Aperture Sonar(SAS) imaging,the displaced phase center(DPC) is often adopted approximately to deal with the multi-receiver data,which essentially takes the data difference between single-receiver and mul-ti-receiver as system error.The system error can be compensated before or during imaging,but it varies with space,and only the center of the beam or scene can be compensated accuracy.In order to solve this problem,the DPC ap-proximate processing is given up and the multi-channel filter-bank is used to transform multi-receiver data into sin-gle-receiver data in this paper,and for clearing up the conflict between wide-band and wide-scene,an improved algo-rithmic is proposed.Simulation results show the validity of this algorithm.