The uncertainty of determination of cadmium in rice by inductively coupled plasma atomic emission spectrometry with wet digestion was evaluated,and the key steps in the determination process were identified.It is found that sample digestion has the greatest influence on the measurement results.Therefore,the loss and pollution of cadmium should be reduced in the process of sample digestion,and the pre-processing method should be optimized to ensure the accuracy of the detection results and improve the levels,quality and efficiency of inspection and detection.