Polylactic acid (PLA) is globally recognized as one of the most promising bio-based plastics for the 21st century. It possesses excellent biodegradability/compatibility, mechanical properties, thermoplasticity, fiber formation capability, and high transparency. PLA is suitable for various processing methods such as blow molding, extrusion, and injection molding, making it convenient to process and some of its properties surpass those of existing general-purpose plastics. However, it also has limitations such as lower strength, brittleness, and poor heat resistance, which restrict its applications to fields like producing general-purpose plastics and films. To expand its use into more demanding areas such as automotive, aerospace, and construction, it must be modified to enhance its heat resistance and mechanical properties. This project aims to utilize research achievements accumulated over many years by the research team, collaborate with relevant enterprises, and carry out the transformation and industrialization of these results. Ultimately, a series of market-potential modified PLA composite material preparation technologies will be formed. For example, the preparation technology of natural fiber reinforced polylactic acid (PLA), high toughness PLA, high filler grade PLA, flame retardant grade PLA, and fiber grade PLA. The modified PLA resin prepared through these technologies will have more excellent and targeted properties, mainly used for producing PLA fibers, films, sheets, containers, etc., and can be applied in fields such as daily consumer goods, agricultural film, materials for aircraft/automotive interiors, etc. The project goal is to conduct in-depth research on some still imperfect technical links, thereby integrating existing technologies and patent achievements, further expanding experiments and standardized testing, forming a series of systematic solution technology packages that can be directly industrialized, and ultimately successfully completing the industrialization transformation of related technical achievements.