In 2018，the global market scale of anti-infective drugs was 120 billion US dollars，with a compound annual growth rate of 4.3%. Nearly 10 new anti-infective drugs had gone on sale since 2015，and these new drugs got good responses afterwards. The biggest factor affecting the rapid growth of the international anti-infective drug market was that many countries around the world had issued “limitation on antibiotics” that limited the use of antibiotics. New factors conducive to the development of the market included：by 2020，there would be patented drugs with up to 150 billion US dollars’ value getting expired，including many best-selling antibiotics，and the third world countries would increase medical expenses.