The trace levels of selenium content in black peanuts were determined by graphite furnace atomic absorption spectrometry（GF AAS）. The sample was ingested with high pressure closed vessel using nitric acid-hydrogen peroxide as solvent. Pd（NO3）2+Mg（NO3）2 were selected as chemical modifiers to increase the thermostability of selenium, and the pyrolysis temperature and the atomization temperature for the experiments were seted at 500 ℃ and 2 000 ℃, respectively. Under the optimal conditions, the calibration curve showed a good linear relationship between the adsorption peak area and selenium concentration in the range of 10-200 μg?L-1 with a detection limit（3σ） of 878 μg?L-1.The relative standard deviation（n=11） of blank sample was 46%, and the recoveries varied from 96% to 113%. The result also indicated that the kernels and coats of black peanuts contained trace selenium and their contents were higher than those of other two local peanuts.