Objective To explore the application value of iDose4 iterative reconstruction technique in myocardial bridge and mural coronary artery. Methods Sixty patients with myocardial bridge and mural coronary artery complex were chosen as the research object, 30 of them underwent iDose4 reconstruction technique and the rest underwent FBP reconstruction technique. The CT images of myocardial bridge were observed, the radiation dose, signal to noise ratio (SNR), contrast to noise ratio (CNR) and image quality score between FBP technology and iDose4 technology were compared. Results It showed 114 cases of myocardial bridge mural coronary artery complex, the incidence rate of left anterior descending branch is 59.61%, the incidence rate of right coronary artery is 1.75%. The average length of myocardial bridge were (17.2±2.7) mm, thickness was (2.4±0.7) mm. IDose4 radiation dose was significantly lower than that of FBP technology (P<0.05). The SNR and CNR of IDose4 were significantly higher than that of FBP (P<0.05). But the difference of two reconstruction image quality score had no statistical significance (P>0.05). Conclusion In the display of mural coronary artery, IDose4 reconstruction technique can reduce radiation dose on the basis of SNR, CNR and image quality, it is worthy of clinical popularization and application.