The core competitiveness of plastic steel sheet piles stems from their material properties. Utilizing polymer composites such as polyvinyl chloride (PVC), these materials are not only lightweight and high-strength but also exhibit exceptional chemical corrosion resistance. They withstand harsh environments like acid rain and salt spray, with a service life extending over 50 years. In terms of cost-effectiveness, plastic steel sheet piles significantly reduce total lifecycle costs. Their lightweight design minimizes mechanical requirements during transportation and installation, substantially improving the overall project’s return on investment. For instance, in riverbank protection projects, their modular design enables rapid assembly, achieving daily construction efficiency several times higher than traditional methods. Simultaneously, their ecological perforated structure promotes soil conservation and biodiversity restoration. When used for high slope protection, plastic steel sheet piles effectively prevent riverbank collapse. Combined with ecological slope protection measures, they achieve dual objectives of flood control and ecological restoration. Urban underground space development also benefits significantly. In subway and tunnel foundation pit support, their elastic modulus adapts to soft soil foundation deformation, reducing the risk of differential settlement. Furthermore, with the promotion of standards such as the Technical Specifications for Plastic-Steel Sheet Pile Retaining Walls in Water Conservancy Projects, this material is accelerating its integration into national ecological construction strategies under policy support, becoming a key implementer of green building and carbon neutrality goals.