Objective To explore the application effect of rehabilitation nursing based on action research in young patients with myocardial infarction. Methods A retrospective analysis was conducted on the clinical data of 95 young patients with myocardial infarction admitted to our hospital from June 2020 to January 2023. They were divided into a control group(n=47) and an observation group(n=48) according to different nursing methods. The control group was given regular rehabilitation nursing, and the observation group was given rehabilitation nursing based on Action research method for 3 months. Compare the compliance behavior, negative emotions, heart function, and quality of life between the two groups. Results The compliance rate of the observation group was 95.38% (46/48), which was higher than 80.85% (38/47) of the control group, with a statistically significant difference (P<0.05); Comparison of adverse emotions, cardiac function, and quality of life between the two groups before nursing, and there were no significant difference(P>0.05); After nursing, the observation group received a Self-rating Anxiety Scale(SAS) score of (41.36±5.67) points, a Self Rating Depression Scale(SDS) score of (44.17±5.23) points, left ventricular end diastolic diameter (LVEDD) level of (41.14±4.60)mm, left ventricular end systolic diameter (LVESD) level of (40.23±3.09)mm, left ventricular end diastolic volume (LVEDV) level of (83.51±6.73)mL, and left ventricular end systolic volume (LVESV) level of (35.18±3.95)mL, (47.80±4.55) points, (52.52±6.14) points, (48.92±5.03)mm, (45.94±4.46) mm, (91.83±6.01)mL, (42.84±5.31)mL lower than the control group; Left ventricular Ejection fraction (LVEF) level was(48.61±4, 20)%, physical dimension score (57.35±3.14) points, illness dimension score (21.24±2.33) points, medical condition dimension score (4.76±0.25) points, general life dimension score (13.19±1.18) points, psychosocial dimension score(23.31±2.98)points, and work condition dimension score (5.15±0.25)points in the Chinese Cardiovascular Patient Quality of Life Questionnaire (CQQC), The scores of(43.42±5.03)%, (53.80±2.46), (17.56±2.35), (4.37±0.20), (11.40±1.20), (18.67±2.66), and (4.69±0.36) points were higher than those of the control group (P<0.05), Conclusion The rehabilitation nursing based on Action research can alleviate the bad mood of young patients with myocardial infarction, improve their compliance behavior and cardiac function, and improve their quality of life [ABSTRACT FROM AUTHOR]