Objective To explore the value of 64-slice spiral CT post-processing technique in the reexamination after coronary stent implantation. Methods A total of 37 cases of patients who accepted reexamination after coronary artery stent implantation in our hospital from June 2016 to November 2017 were selected. All of the patients were checked by CT coronary artery scan, and their imaging data were collected. After the observation of their patency in stents, stents blood vessels, and non - vascular stent spiral, the analysis of application value of CT post-processing technique in the reexmination of coronary artery stent implantation were represented. Results According to the CT scan image among 56 stents, 51 (91.07%) stent gained patency, and uniform densit. After enhancement of scanning, coronary artery vascular density is consistent with the density of the stent, and stent stenosis was not seen at the near end, and the end of stent appeared normal. Most CPR images of the anterior descending vascular showed metal stent shadow in the near segment and patency in blood vessels, with unobstructed lumen and calcified plaque shadow in 4 patients. Three stents appeared stenosis or occlusion. CT scan was visible inside to see low density shadow, and the CPR images and vascular cross-sectional images showed that luminal stenosis rate is about 30%-30%. No contrast agent in the enhancement scanning was seen in a stent, adjacent to which slender vessels collateral circulation was observed. CPR images in 27 vessels showed 10 soft plaques in front of the stent, no obvious stenosis in the local lumen, and calcified plaques in the middle segment. There were 5 hard plaques, 3 mixed plaques, 5 soft plaques, 2 hard plaques and 2 mixed plaques. Heart VR images and heart VR tree images can clearly show that patients with coronary blood vessels had metalic stents. In 37 found cases, 21 of the blood vessels were appeared in the vascular stenosis stent, including 13 cases of single blood vessels, 8 cases of double vessels. Conclusion 64-spiral CT post-processing technique can be intuitively, three-dimensional display of coronary artery stent to show whether the stenosis happened again, it can also be used as a main approach for reexmination after coronary artery stent implantation.