Abstract: Aiming at the existing problems in clinical teaching of medical undergraduates, such as inadequate teaching resources, limited clinical training opportunities, clinical teaching lack of standards, mixed teachers' teaching levels and nonstandard evaluation systems, this article takes an example of Sun Yet-san University to introduce its practices and effects, including the construction of high-level clinical simulation platform, the cultivation of high-quality faculty, the optimization of "three-stage" clinical assessment, the establishment of uniform standards for practical teaching, and the enhancement of quality control during teaching process. The whole quality improvement program highlights the benefi cial guideline of early, adequate and repeated clinical practices.