Objective：To establish the method of determination of cadmium in rice by direct dilution injection graphite furnace atomic absorption spectrometry.Methods：Crushed rice was diluted by mixture of 0.5% nitric acid and 0.1% Triton.Then the diluent was well shaken for further test.NH4H2PO4+Mg（NO3）2 were chosen as the matrix modifier，while the Zeeman effect background deduction method was adopted.The samples were subjected to one-step ashing method（argon），and two-step ashing method（argon+air），respectively，to create external standard calibration curves.The standard addition method was used to determine cadmium content in rice.The results showed that the RSD（N=6）of three methods were 1.78%，3.29%，and 0.62%，while the recovery rates were 114.7%，103.9%，and 102.5%.The detection limits were 0.025，0.031，and 0.035 μg/L.After T test of pairwise comparison，no significant difference was shown between two-step ashing method and standard addition method，and the accuracy and precision meet the requirements for determination well.Conclusion：As a simple，rapid and non-polluting method，the direct dilution injection graphite furnace atomic absorption spectrometry can be used for the determination of cadmium content in rice precisely and accurately.