Drug synthesis has already become an essential technology for medical production and has a very important significance for the use of drugs in the medical industry. Treatment after drug synthesis is a prerequisite for obtaining a finished product in drug synthesis. Therefore, the role of drug synthesis post-treatment in the drug synthesis process is very clear, played a decisive role, it can be said to have provided a powerful security in the production of pure product synthetic drugs. However, at the moment, we are not focusing on post-drug research, so this article focuses on and analyzes the problems after drug synthesis, which will play a very active role for the sustainable development of drug manufacturers.