Plastic recycling is a very troublesome thing. The core problem is that the cost after recycling is higher than that of new plastics. Considering that biological fermentation is actually a chemical reaction, it will attack from the weakest link. Therefore, bioplastics are in a slightly harsh environment. This kind of plastic can be degraded. Theoretically, the method of disposal is to throw it in the ground casually, so it can be landfilled. Bioplastics are a very bright prospect, but the biggest problem at present is expensive. To solve the expensive problem, it also needs to solve the problem of production time, and the use of performance is still the primary concern, so the development is not fast. At present, the promotion of biodegradable plastics in agriculture is a very good direction. First, there is a demand for this aspect, and the second is that it does not require high other properties, and the amount is large, which can support the development of the industry. Of course, medical products are also a very important demand field. It can be recycled, but the cost may not be worthwhile. Thermoplastic materials can be recycled directly by thermal processing. There is no need to degrade. The purpose of degradation is more not to recycle, because recycling may cost more. So enough performance is very important. Recycling does not necessarily require degradation. Whether to recycle or not depends on national policies and reclaim profits.