Abstract: The present paper reports on the determination of portal blood flow in schistosome-infected rabbits and normal rabbits by the use of electro-magnetic flowmeter. It is found that the values of portal blood flow in 10 schistosome-infected rabbits and 8 normal rabbits were 34.4 ±7.3ml/min and 66.9 ±5.5ml/min respectively,the difference being statistically signifi-cant. This method of determination is direct and accurate.