[Abstract] Objective The function of autologous arteriovenous internal fistula was evaluated by ultrasonic doppler parameters of brachial artery.Method 102 patients were divided into functional group and functional disorder group according to the normal pump blood flow and decreased pump blood flow during hemodialysis. The blood flow (BF), resistance index (RI) and pulsatile index (PI) of brachial artery were measured by doppler ultrasound, and the parameters of the two groups were compared. Result Functional groups and dysfunction in the brachial artery flow, resistance index and pulsation index was statistically differences, brachial artery flow, resistance index and pulsation index to predict outcome the cutoff value of 455 ml/min, 0.53 and 0.82, AUC were 0.747, 0.807 and 0.977, the sensitivity was 55.56%, 55.56% and 86.11%, specificity of 90.91%, 93.94% and 100.00% respectively. Conclusion Doppler parameters such as brachial artery BF, RI, PI can provide valuable information for the function of autologous arteriovenous internal fistula in hemodialysis patients.