Controlled release drug is pharmaceutical, polymer biology, and other fields of interdisciplinary science. This paper introduces a system of controlled release drug types, and the mechanism of polymer materials, and highlights the controlled release of drugs in medical application development status. Controlled release drug is pharmaceutical, polymer biology, and other fields of interdisciplinary science. This paper introduces a system of controlled release drug types, and the mechanism of polymer materials, and highlights the controlled release of drugs in medical application development status.