Abstract: The western district of Hangzhou is prone to flood disaster due to its low-lying location where is influenced by upstream mountainous flood and the back water effect of Hangjiahu plain. Taking the flood control of Typhoon Krosa in 2007 as the objective and according to the river system distribution and urban layout in the district, we propose 10 flood control schemes involving flood discharge, wetland regulation & storage and polder construction. The pros and cons of the 10 schemes are compared from the aspects of water level, flood volume, investment, impact on surrounding areas, policy processing etc.. In conclusion, the composite scheme of underground drainage passage from Xixi Wetland to Qiantang River, Xixi Wetland regulation & storage and partitioned polder construction is recommended. The recommended scheme can effectively alleviate flood problems in western Hangzhou.