Objective To investigate the 64 CT coronary angiography in patients with coronary heart disease (CHD) before and after reascularization evaluation function. Methods 56 patients with coronary heart disease (CHD) were randomly selected as the research objective. 56 cases of volunteers for healthy people were researched as the health person. To observe coronary CTA reconstruction image results , the result of coronary angiography, CTA and comparison of the CAG, 64 layer spiral CTA lesions show the results of the major coronary arteries branch, the degree of accuracy of CTA for medium and severe coronary lesions. Results 56 patients, 52 patients of different parts and different degree of stenosis, a total of 104 narrow blood vessels, 22 cases of single lesion, 30 patients with multivessel lesions. Caused by calcification plaques 42, narrow narrow 10 mixed plaque, not narrow 52 branch of calcified plaque.64 layers spiral CTA and the CAG of coronary artery stenosis degree have good consistency. The degree of accuracy of CTA for medium and severe coronary lesions was high(95.54%). Conclusion 64 CT coronary angiography in patients with coronary heart disease (CHD) reascularization value higher, clinical should be combined with the actual situation, to improve the patient's quality of life.