In order to study the relationship between Nanhui beach reclamation and beach sedimentation transportation on the top of Jiuduansha shoal as well as sediment transportation crossing the south training dike of the Yangtze estuary deep-water channel engineering, comparative experiments of fixed bed sediment transport before and after the reclamation are made on the Yangtze estuary model. The cross dike sediment transportation along with sediment incipient motion along Jiuduansha shoal is studied, then according to the bottom sediment distribution in the north passage, the influence on the deep-water channel in the north passage caused by the reclamation can be analyzed. The study shows that the bottom sediment of Jiuduansha shoal can be transported crossing the south training dike into the deep-water channel with or without reclamation. When the reclamation is executed, less sediment of the head part of Jiuduansha shoal is transported into the channel in the north passage, but mort sediment of the medium part of Jiuduansha shoal is transported into channel.