Abstract:Object：To explore the feasibility and application effect of Mini-CEXEvaluationin echocardiography teaching of residents in pediatrics standardized training. Method：One hundred and twenty residents who received standardized residence of pediatrics in the department of Ultrasonography in Children’s Hospital of Nanjing Medical University from January 2021 to December 2022 were selected as research objects. Echocardiography training for 4 weeks. The residents in 2022 were selected as the experimental group：the Mini-CEX evaluation was used to evaluate their clinical ability during the learning period and the examination. The residents in 2021 were selected as the control group：traditional teaching and assessment were used. All of them in both groups underwent theoretical and practical examinations when they left the department. To evaluate the effect of Mini-CEX as a teaching guidance and assessment method. Results：The Mini-CEX scale was used for 4 times during the study period and in the examination. In this study，a total of 60 residents participated in the evaluation and 240 cases were completed. The Mini-CEX test results of all residents were qualified. The scores of medical interview，ultrasound examination，clinical judgment，doctor-patient communication，organizational effectiveness，humanistic care and overall evaluation were 8.7±0.5，8.3±0.7，8.5±0.6，8.5±0.5，8.4±0.6，7.9±0.7，7.7±0.6，respectively. Compared with the control group in 2021，the theoretical and practical scores of the experimental group were improved to varying degrees compared with the control group，and the difference was statistically significant. Conclusion：The results have showed that the Mini-CEX scale is simple and feasible in the teaching of echocardiography for pediatric residents. It maybe helpful to improve the clinical ability of pediatrics residents and it can be used as an evaluation method for the teaching of echocardiography for pediatric residents.