At present

diagnosis and improvement of teaching quality in higher vocational colleges mainly depends on the internal quality assurance system shaped by five vertical

five horizontal and one platform. Practical teaching is of great importance to medical education. As its teaching quality is mainly generated from the hospitals which are difficult to be integrated with the existing internal quality assurance system. This article tries to build a diagnosis and improvement system for training interns through a method focusing on five elements and seven ways of giving feedback on the basis of the in-depth analysis of factors generating the quality of intern training. This system aims to continuously ensure the quality of interns training via supplementing and perfecting the existing internal quality system of medical colleges.