The content of lead and cadmium in drinking water was determined by flame atomic absorption spectrometry.The results showed that the linear relationship between Pb content in the range of 0~0.020 mg·L-1 was good,the correlation coefficient(R2)was 0.999 2,and the lowest detection concentration was 0.004 mg·L-1.The linear relationship between Cd content in the range of 0~0.010 mg·L-1 was good,the correlation coefficient(R2)was 0.999 3,and the lowest detection concentration was 0.002 mg·L-1.The relative standard deviations of the two elements were 7.0%~8.8%,and the recoveries were 95.0%~103.8%.The method is simple and stable,and is suitable for the determination of lead and cadmium in drinking water.