The dredged soil is gradually becoming the effective supplement of sediment resource in the Yangtze estuary. Since the tidal flat reclamation project behind Changxing submerged breakwater is adjacent to the deepwater channel of 12.5 m in South Channel of the Yangtze estuary, the utilization of dredged soil in channel has a significant advantage in geographic location. Based on the investigation of the dredged soil conditions, according to the characteristics of the reclamation project, this article selects the suitable dredging and filling process, and puts forward the feasible technical scheme. The results show that the deepwater channel dredged soil in the section of South Channel to Yuanyuan shoal has the characteristics of abundant and stable production, short transportation distance, and good condition of soil texture, which can satisfy the requirements of sediment in the reclamation project. In all kinds of dredging and filling process, bow-blowing technology and trailing suction hopper dredger (TSHD) loading barge technology have well applicability in the project. The bow-blowing technology is mature, and can be applied. And the TSHD loading barge technology as an alternative can be used when putting into operation formally at the end of 2013. The research results reveal the sediment resource for the tidal flat reclamation project, and achieve a win-win situation of channel dredging the channel and land reclamation.