Abstract: Objective To study and evaluate the application effect of progressive cases in internal medicine nursing teaching. Method A total of 100 students in two classes of nursing major in our school of grade 2020 were selected as the main body of the research, and the two classes were divided into a reference class (50 students, conventional case teaching methods) and an experimental class (50 students, progressive case teaching methods), after the course is over, compare and analyze the implementation effects of different teaching methods. Results The students in the experimental class gave teachers a significantly higher grade of teaching quality compared to the reference class. There was a significant difference in teaching design and teaching methods between the two classes in teaching evaluation scores P<0.05; after the implementation, the experimental class was looking for the truth and emancipating the mind; The total scores of scores and critical thinking in terms of analysis ability, systematization ability, desire for knowledge, cognitive understanding, and critical thinking were significantly higher than those in the reference class, P<0.05. Conclusion In internal medicine nursing teaching, the use of progressive case teaching methods can help strengthen students' learning ability and critical thinking.

Key words: Progressive cases, Internal medicine nursing, Teaching effect