Abstract China's plastic hardware products industry has entered an adjustment period with overcapacity, stricter environmental policies and sluggish downstream demand. A large number of small and medium-sized traditional plastic manufacturers rely on low-price OEM and single product model, suffering from lack of strategy, extensive management, weak R&D and blank brand. Strategic transformation is the core way for enterprises to break through bottlenecks. Taking the strategic transformation project of **** New Materials Co., Ltd. as a single case, this paper adopts case study, PEST, Porter's five forces, SWOT matrix and benchmark comparison to analyze the external industry environment and internal operational problems of traditional plastic manufacturers. It fully sorts out the top-level design, phased path and key implementation steps of strategic transformation, and quantitatively evaluates short-term achievements and long-term performance. The research shows that traditional plastic hardware manufacturers should adopt growth strategy combined with cost leadership and differentiation strategy, and implement transformation from business, intelligent production, human resource, digital marketing and R&D. The core difficulties of small plastic enterprises include insufficient strategic awareness, capital shortage and lack of professional talents. Through the six-year transformation plan (2025-2030), **** revitalized production capacity, built B2B industrial platform, expanded multi-category new materials and improved digital system. The company achieved obvious growth in production and per capita output in short term, and will realize industrial finance and integrated supply chain in the long run. This paper summarizes a general strategic management framework for plastic hardware SMEs, providing replicable practical experience for similar manufacturing enterprises. Keywords: Plastic Hardware; Strategic Management; Strategic Transformation; ABS Modified Materials; Manufacturing Enterprise; Case Study.