Abstract: The current flood control and management patterns at basin level, regional level, and urban level (including polder areas) in the Taihu Basin are increasingly incoherent, escalating flood risks.In this paper, we reviewed the formation process of the flood control and management patterns at the three levels in the Taihu Basin, employed a hydrodynamic mathematical model of the Taihu Basin to simulate flood routing under various scenarios in the context of high-level urbanization, analyzed the specific manifestations and causes of the current incoherence in the flood control and management pattern, and proposed optimization plans from the perspective of enhancing the layout coordination of the major flood-conveyance channels and the provincial-border areas.The results indicate that under the backdrop of high-level urbanization, in the event of rainfall over 50-year recurrence, the flood levels in the river network of the Taihu Basin rise considerably, the flood discharge capacity of the main channels diminishes, so it becomes impossible to achieve the target of defending against the 100-year flood.We propose optimization schemes containing three aspects: along the Huangpu River by "expanding the blockage, increasing the outlet, blocking the high tide and increasing the discharge"; along the Wusong River by "primarily discharging waterlogging, discharging flood in medium and low river level, appropriately diverting flood"; and in the west bank of Wangyu River by "expanding the northward drainage and reducing the eastward drainage", which can achieve the planning objectives and promote the coordination of the three-level management pattern.The research results can provide reference for flood control and management in Taihu Basin in the new period.