Affected by increasing human activities and frequent extreme weather events in recent years，sandy coasts around the world are facing severe erosion and degradation. Effectively solving the problem of habitat degradation，improving the resilience of coastal zones，and fulfilling the dual functions of ecological environment improvement and natural disaster management are important issues that many regions pay close attention to. The increasingly evident negative effects of previous coastal remediation methods and the policy restrictions on traditional hard engineering give rise to the exploration of nature-based solutions（NBS）featuring sustainable management of coastal resources. In response，this paper takes four stretches of sandy coasts with obvious erosion and degradation on the west coast of Haikou in China as an example. Resorting to the numerical simulation technology and the NBS policy，the paper explores the bionic design forms of straight and cape-shaped beaches and builds submerged reef and cape head sections and artificial dunes to construct a comprehensive protection system that combines flexible beaches with hard revetments. Innovative ideas for regional beach sediment management are drawn on to propose a beach management model of cyclic sand supplementation & periodic maintenance to promote the natural recovery of the ecological environments on damaged coasts.