In this paper, we use traditional Chinese medicine classic decoctions to treat COVID-19 patients. After diagnosis, we conduct Xiao-chai-hu Decoction, Ge-gen Decoction, Bellflower Decoction, Shi-zao Decoction, etc. for treatment. As the COVID-19 epidemic continues, the course of the disease is complex. With the yin and yang disease changing as the core, and by mastering the changes in syndromes that tend to turn cold and hot, we make the connotation of medical prescriptions be deeper and broader. Therefore, physicians can contribute to the diagnosis, treatment and care of the health of the whole people. We hope this case sharing can provide some ideas for the field in healthcare.