Abstract: The implantable drug delivery system is one of the important components of the sustained and controlled release drug delivery system. It is suitable for long-term administration and targeted drug delivery with the characteristics of high drug loading, small size, long duration time, few side effects and high bioavailability, and can also greatly improve the compliance of patients with chronic diseases, so it has attracted more and more attention from the pharmaceutical industry. With the continuous development of their various types, routes of administration and production technology, implants have been applied to many fields such as reproductive healthcare and the treatment of cancer, pain and ocular diseases. By reviewing the types of implants and clinical research application and development at home and abroad in recent years, this paper intends to provide reference for further in-depth study on this dosage form.