Abstract: The volatile phenol and cyanide in groundwater are determined simultaneously by SEAL AA3 continuous flow analyzer. Under the optimal experimental conditions, the standard curve correlation coefficients of volatile phenol and cyanide are all above 99.5%, with the detection limits of 0.221 μg/L(measured by -OH) and 0.868 μg/L (measured by -CN), respectively, and good precision and accuracy, the relative standard deviations of both less than 1.5%. The sample recovery rates of volatile phenol and cyanide are 94.76%-102.5% and 92.8%-103.01%, respectively. There is no significant difference between the duel-index simultaneous test and single-index separate test. The continuous flow analysis for simultaneous determination of volatile phenol and cyanide in groundwater is characterized by short test period and high degree of automation, which is suitable for simultaneous testing of large quantities of samples.