Abstract: To study the the characterisitcs of blood flow on splenic vein (SV) and portal vein (PV) and the correlation with Child-Pugh. There were 168 cases of hepatic cirrhosis. The liver function was graded Child-Pugh A in 43 cases, Child-Pugh B in 67 cases and Child-Pugh C in 58 cases. The inner-diameter and blood stream speed of the splenic vein and the portal vein were measured by the color Doppler ultrasonography. The blood flow volume were calculated. Fifty-nine healty people served as controls in this study. When the proportion of the blood flow volume between SV and PV (Qsv/Qpv) increased, the liver function on patients with hepatocitrrhosis descended gradually. There were very significant difference in all study groups (P<0.01) . When the best cut-off value of the Qsv/Qpv was 40%, the diagnostic sensitivity, specificity and accuracy rate to the decay to Child-Pugh B or down of liver function with hepatic cirrhosis were 80.80%, 74.42% and 79.17%, respectively. The color Doppler ultrasonography is a very significative clinical means in the judgment of liver function situation on patients with hepatocirrhosis.