Objective:To explore the application value of real-time vascular quantification stiffness (R-VQS) technique in evaluating carotid artery elasticity and hemodynamic status in type 2 diabetic nephropathy (T2DN).Methods:The clinical data of 86 patients with T2DN treatment in the Fifth People′s Hospital of Zhuhai from March 2020 to March 2022 were collected retrospectively, according to the clinical stage, 44 patients were in the early stage group and 42 patients were in the clinical stage group. All of them underwent R-VQS technique to obtain carotid artery elasticity parameters stiffness index (HC), systolic diameter (Diam), diameter change value (Dist) and hemodynamic indexes pulse conduction velocity (PWV). Among the 86 patients, 21 had atherosclerosis (AS) and 65 did not. The differences of HC, Diam, Dist and PWV between the patients with and without AS were compared, and the value of HC, Diam, Dist and PWV in diagnosing T2DN complicated with AS was analyzed by receiver operating characteristic (ROC) curve.Results:The HC, Diam and PWV in the clinical phase group were higher than those in the early phase group, and Dist was lower than that in the early phase group: 4.76 ± 0.60 vs. 4.15 ± 0.52, (8.69 ± 1.13) mm vs. (7.21 ± 0.84) mm, (7.42 ± 0.63) m/s vs. (6.84 ± 0.57) m/s, (0.27 ± 0.07) mm vs. (0.35 ± 0.09) mm, there were statistical differences ( P<0.05). The HC, Diam and PWV in the patients with AS were higher than those in the patients without AS, and Dist was lower than that in the patients without AS: 4.82 ± 0.63 vs. 4.33 ± 0.51, (8.85 ± 1.18) mm vs. (7.63 ± 1.06) mm, (7.68 ± 0.75) m/s vs. (6.94 ± 0.59) m/s, (0.24 ± 0.05) mm vs. (0.33 ± 0.10) mm, there were statistical differences ( P<0.05). ROC curve analysis results showed that the area under the curve (AUC) of the combined diagnosis of T2DN complicated with AS by HC, Diam, Dist and PWV was 0.921, and the diagnostic sensitivity and specificity were 90.48% and 84.62%, respectively. Conclusions:R-VQS technology can detect abnormal changes in carotid elasticity and hemodynamics in patients with T2DN, and can diagnose T2DN complicated with AS. It can provide a reference basis for clinical prevention and treatment of cardiovascular and cerebrovascular complications in T2DN patients.