The rigid flood bank such as the cemented gravel embankment is safer when facing excessive flood，and has smaller sections，with less land occupied，but the traditional cemented gravel embankment ignores the ecological function. By combining the ecological function with the cemented gravel embankment in the design of Tangba flood bank of Minjiang Qianwei navigation and power hub project，we propose the scheme considering both remarkable function and ecologic performance，and analyze the economic and social benefits of cemented gravel embankment’s soil and water conservation. The result shows that the cemented gravel embankment can combine the safety property with ecological functions in many ways，and achieve the effect of green ecology and beautiful landscape，reduce the amount of soil erosion on the reservoir bank to protect biodiversity，thus it is more suitable for the urban embankment.