〔Abstract〕 Objective To analyze the effect of psychosomatic relaxation training combined with dual-heart nursing on patients with coronary heart disease after percutaneous coronary intervention (PCI). Methods A total of 80 patients with coronary heart disease received PCI postoperative nursing in Zhumadian Central Hospital from September 2019 to September 2021 were selected and randomly divided into a control group and an observation group, with 40 cases in each group. The control group was given routine nursing, while the observation group was given psychosomatic relaxation training combined with dual-heart nursing. The nursing effects of the two groups were compared. Results After 2 weeks of nursing, the psychological state of the two groups was significantly improved compared with that before nursing, and the scores of hospital anxiety and depression scale (HADS) and the total score of the observation group were lower than those of the control group, and the differences were statistically significant (P < 0.05). After 2 weeks of nursing, the degree of psychological distress of the two groups was significantly improved compared with that before nursing, and the psychological distress thermometer score of the observation group was lower than that of the control group, and the differences were statistically significant (P < 0.05). After 2 weeks of nursing, the Pittsburgh sleep quality index (PSQI) scores of the two groups were lower than those before nursing, and the PSQI score of the observation group was lower than that of the control group, and the differences were statistically significant (P < 0.05). After 2 weeks of nursing, the cardiac function grading of the observation group was better than that of the control group, and the difference was statistically significant (Z = 6.694, P < 0.05). Conclusion Psychosomatic relaxation training combined with dual heart nursing can improve the psychological status of patients with coronary heart disease after PCI, alleviate psychological pain, improve the quality of sleep, and promote the recovery of cardiac function.