Objective To explore the cerebral CT imaging features in patients suffering cyanotic congenital heart disease and to analyze the relationship between sagittal sinus density, concentration of hemoglobin (Hb), red blood cells deposited (HCT),and the red blood cell count (RBC). Methods Preoperative cerebral CT imaging features in 52 patients with cyanotic congenital heart disease (CCHD group) were analyzed and relevant data were compared with the findings in normal healthy people (50 persons in this group ). To observe the images and to measure its superior sagittal sinus CT value, the concentration of Hb、HCT and RBC counts were referred to for statistical analysis. Results Among 52 cases of cyanotic congenital heart disease, normal cerebral CT sinus and cerebral blood density were found in 5 patients (9.61%); Blood density slightly increased in 15 cases (29.41%); Moderately increased in 18 cases (34.61%); Increased heavily in 14 cases (26.92%), especially sagittal sinus showed the highest rate. Measured and analyzed, an obvious parallel correlation between superior sagittal sinus CT value and Hb existed; The superior sagittal sinus CT value in patients with cyanotic congenital heart disease is higher than that in CT normal group, the difference has significant statistical significance (t=12.864,P<0.01). Conclusions Increased density of intracranial venous sinus and cerebral vascular is showed in cerebral CT scanning of CCHD Patients; Increased blood density is associated with increased hemoglobin concentration, especially the sagittal sinus is increased more significantly.