Plastic products are classified according to their material quality. Different types of recyclable PET (polyethylene terephthalate) and HDPE (high-density polyethylene) are commonly found in beverage bottles and plastic bottles, belonging to the relatively easy to recycle "No. 1" and "No. 2" plastics., It belongs to the "No. 3" plastic that is difficult to recycle. LDPE (low-density polyvinyl chloride) is used for plastic bags and films due to its complex ethylene recycling process due to the presence of chlorine elements. Although it is lightweight, it still has good recycling potential. PP (polypropylene) has a wide range of applications and high recyclability, making it a "No. 5" plastic. PS (polystyrene) is commonly used in disposable tableware, with high recycling costs and difficulty in recycling. PTH refers to other uncommon plastics, with varying levels of difficulty and methods of recycling. Promoting plastic recycling is crucial for environmental protection.