Since the global outbreak of the COVID-19 virus, the resulting medical waste has increased. Plastic pollution to the Earth's environment is already very serious, and now because of the proliferation of medical plastic waste, the environmental pollution problem is becoming more serious. This paper discusses some green medical waste treatment technology and some medical waste reuse retreatment technology. This paper mainly expounds on the problems being in the disposal of medical waste, such as the amount of medical waste being too large, and there is no standard place for recycling daily medical waste. The treatment methods are usually incineration and landfill, but these treatment methods will produce harmful substances and gases, will pollute the environment, and affect biological health. And there is a high chance that COVID-19 will spread again. At the same time, some environmental treatment methods for medical waste, such as microcapsule technology and photocatalytic degradation technology, are introduced. It can reduce the emission of polluting gases and reduce the pollution to the environment. Or by recycling medical waste, processing and reusing it to produce new materials. For example, plastic cracking oil production technology and waste mask iron-making technology will recycle medical waste for reuse. This paper hopes that the new medical waste treatment technology can be widely understood and used. It is also hoped that some more efficient, low consumption and low pollution medical waste treatment methods can be developed to reduce the environmental pollution caused by the existing treatment methods.