研究了互花米草（Spartina alterniflora Loisel）促淤固土、缓流消浪的护坡功能，确定了互花米草海挡护坡的最佳条件，构建了大断面土堤型植物护坡吹填筑挡新模式，改变了传统的护砌型式。可有效防止或减轻潮汐风浪对海挡迎水坡的淘刷和侵蚀，保护海挡的安全，工程效益、经济效益和生态效益显著。

Spartina alterniflora Loisel was used to protect slopes in sea wall engineering, which replaced the traditional protection model of sea wall by large area of claybank. Because the stems can prevent sea wave and the root systems can strengthen the dyke, significant effects was got on slowing the current, eliminating the sea wave and immobilizing the soil. As an important component of blow - fill-construct sea wall engineering, erosion of tide and stormy waves on sea wall water-meeting slope was effectively prevented or alleviated and safety of sea wall was guaranteel by using Spartina alterniflora to protect slopes. Significant engineering, economical and ecological benefits were obtained.