It is important to evaluate the complex coronary artery disease in the diagnosis and treatment of coronary heart disease.The SYNTAX score based on invasive coronary angiography (ICA) (also referred to as ICA-SYNTAX score) plays a positive role in the selection of revascularization of complex coronary artery disease and the prediction of adverse events.The development of coronary computed tomography angiography (CCTA) technology promotes the clinical application of SYNTAX score (CCTA-SYNTAX score) based on coronary CTA, and also enriches the examination methods of patients with coronary heart disease. The CCTA-SYNTAX score has the advantages of non-invasiveness, simple operation, good reproducibility, and relatively low cost, which can make it play an increasingly important role in the diagnosis of coronary heart disease. A number of foreign studies have confirmed that CCTA-SYNTAX score is highly correlated with ICA-SYNTAX score, which further promotes the study of CCTA-SYNTAX score in revascularization of percutaneous coronary intervention (PCI) or coronary artery bypass grafting (CABG) and adverse event prediction.Therefore, the CCTA-SYNTAX score can be an auxiliary method for the ICA-SYNTAX score, as the first choice for preoperative evaluation and postoperative review of patients with coronary heart disease.