Abstract: Based on bathymetric data and historical information in different years, this paper analyzed Xili bay beach’s erosion and deposition evolution characteristics and explored beach evolution trends after implementing different restoration schemes by Litline module in MIKE21, aiming to enhance its coastal stability and optimize its sea-friendly space. The research results show Xili bay beach exhibits significant erosion on the east-side and deposition on the west-side, the down-cutting amplitude in the beach berm exceeds 2.6 m at east-side erosion hotspots, while the rest of the shoreline basically maintains an equilibrium between erosion and deposition, with only occasional small-scale local erosion. Furthermore, it is east-side erosion, west-side stabilization, central-side silation, and concomitant substantial local erosions that are the overall underwater slope morphology characteristic in Xili bay beach. The comparison of shoreline simulation results for various beach nourishment schemes indicates the outstanding effectiveness in combating beach erosion and sediment loss in Xili Bbay Bbeach, by utilizing an ecological restoration scheme combined with progressive beach nourishment and groin, which contributes to optimizing beach stability and coastal landscape, and further elevating disaster prevention and mitigation capabilities, ecological environment quality, and sea-friendly space quality in Xili bay beach.