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Objective To explore the application effect of traditional teaching combined with problem based learning (PBL) in the teaching of transfusion medicine taking the chapter of Human Leukocyte Antigen System and Testing in Clinical Blood Transfusion Testing Technique as an example. Methods Firstly, practical problems in chapter Human Leukocyte Antigen System and Testing were analyzed. Then, in response to the key and difficult points in the teaching of this chapter, examples were given to illustrate the practical application of traditional teaching combined with PBL in the teaching of Clinical Blood Transfusion Testing Technique from the aspects of teaching objectives, teaching processes, course implementation and implementation effects. The teaching effectiveness was evaluated through a questionnaire. Results Traditional teaching combined with PBL helped students grasp important knowledge and techniques, break down thinking barriers, grasp internal connections and characteristics, simplify the learning process, stimulate interest in learning and enhance team collaboration. Meanwhile, students' exploration and innovation abilities could be further cultivated through extracurricular expansion by teachers, thus achieving ideal teaching effect. The questionnaire showed that over 90% of the students consider that combining traditional teaching with PBL was beneficial for improving teaching effect. Conclusion In the teaching of transfusion medicine, adopting traditional teaching combined with PBL according to the textbook content can improve the teaching effect, which is beneficial for the cultivation of comprehensive talents.