Tianxingzhou is a central bar of the lower reaches of the Yangtze River.The piers on the north side of the proposed Changtai Yangtze River Bridge are arranged adjacent to the tail of Tianxingzhou.We carry out physical model tests to study the influence of Changtai Yangtze River Bridge construction on Tianxingzhou tail evolution.The results show that after the construction of Changtai Yangtze River Bridge，the scouring range of Tianxingzhou tail is increased compared with that before the project.This is not conducive to the stability of Tianxingzhou slot，so it is necessary to protect the beach at Tianxingzhou tail.Compared with the beach protection scheme with higher submerged dike elevation，the low submerged dike scheme causes a slightly smaller increase (within 0.03 m/s) in velocity near the Tianxingzhou tail and a slightly smaller decrease (within 0.02 m/s) in velocity in the Tianxingzhou slot，which is more conducive to the stability of Tianxingzhou tail and the water depth maintenance of the temporary channel of Qiwei.The implementation of the project can protect Tianxingzhou tail，and there is slight scouring near the downstream of the bridge site of the temporary channel of Qiwei，which is conducive to the maintenance of the water depth of the channel.