Objective To evaluate the clinical value of cardiac magnetic resonance imaging in the diagnosis of ischemic cardiomyopathy. Methods Cardiac magnetic resonance imaging was performed on 96 patients with clinically diagnosed ischemic cardiomyopathy by Dutch Philips 3.0T magnetic resonance spectroscopy, along with echocardiography and coronary CTA. Post-processing analysis was performed using a Philips Cardiac MR Analysis workstation to calculate cardiac function parameters such as left ventricular ejection fraction, stroke volume, and cardiac output, and compared with echocardiographic results; at the same time, the characteristics of cardiac morphology, perfusion and delayed enhancement were analyzed, and the clinical application value was compared with that of coronary CTA. Results Ejection fraction (55.98%±14.2%) VS (56.34%±10.8%), stroke volume (56.66±13.84) VS (57.148±9.96), and cardiac output (3.74±0.99) VS (3.73±0.79) measured by cardiac MRI and echocardiography were not statistically significant (P > 0.05). Among the 96 patients, the reduced myocardial firstpass perfusion signal was by 56 cases; the myocardial delayed enhancement was 36 cases, of which 8 cases had ventricular aneurysm and 6 cases had chronic heart failure. Conclusions Cardiac magnetic resonance has unique advantages in the diagnosis of ischemic cardiomyopathy.