Objective:To investigate the correlation between venous collateral circulation and clinical data such as symptoms, parenchymal injury, and prognosis in patients with cerebral venous thrombosis(CVT).Methods:The clinical and imaging data of patients with CVT diagnosed in the department of Neurosurgery of the Third Affiliated Hospital of Southern Medical University from December 2011 to August 2018 were retrospectively analyzed. A total of 32 patients with CVT were included, 19 males and 13 females, aged from 20 to 60 (39±12) years. All patients underwent cerebral angiography, individualized delayed rotational phlebography. According to the number and diameter of collateral circulation and the phenomenon of flow delay of contrast medium, the collateral venous circulation scale (CVCS) was developed and divided into 3 levels. The clinical data (risk factors, course of disease, clinical symptoms), imaging data (parenchymal injury, thrombus site), treatment (endovascular treatment, decompressive craniectomy) and prognosis of all patients were recorded. The differences in clinical data, imaging appearances, parenchymal injury, and prognosis between patients with different CVCS were compared, and the correlation between variables with statistically significant differences and CVCS was compared using the Gamma method or Spearman correlation analysis.Results:Among the 32 patients with CVT, 9 were CVCS 0, 13 were CVCS 1 and 10 were CVCS 2. Among them, there were 19 cases of neurological deficit and 17 cases of brain parenchymal injury. There were significant differences in course of disease, neurological deficit, focal dyskinesia, language dysfunction, consciousness disorder, isolated headache, deep vein thrombosis, cortical vein thrombosis and prognosis across different CVCS ( P<0.05). Correlation analysis showed that CVCS was positively correlated with course of disease and isolated headache ( r=0.724, 0.637, P<0.001), and negatively correlated with neurological deficit symptoms, focal dyskinesia, disturbance of consciousness, brain parenchymal injury and deep vein thrombosis ( r=-0.797, -0.451, -0.782, -0.697, -0.427, P<0.05). The results of 90 days follow-up showed that there were 18 cases with mRS 0, 6 cases with mRS 1, 2 cases with mRS 2-4, and 1 case with mRS 5-6 points. There was a negative correlation between CVCs grading and mRS score at 90 days ( r=-0.732, P<0.001). Conclusion:Lower cerebral venous collateral circulation grade is associated with higher incidence of brain parenchymal injury, neurological deficit symptoms, and worse clinical prognosis.