Objective: To determine the content of Pb and Cd in Bombyx Batryticatu by GF-AAS. Method: This paper collected 6 different sources of Bombyx Batryticatus

used a mixed solution of conc. HNO3 and HClO4 (4:1) to digest the sample of Bombyx Batryticatu

the content of Pb and Cd was determined by GF-AAS. Result: Tight correlation between values of absorbance and mass concentration of Pb and Cd were obtained in the ranges within 40 μg·L-1 and 7.2 μg·L-1 respectively

with detection limits(3 s) of 1.02 μg·L-1 for Pb and 0.10 μg·L-1 for Cd.A total of 6 Bombyx Batryticatus samples were determined with the result of not more than 5.0 mg·kg-1for Pb and less than to 0.3 mg·kg-1 for Cd. The values of recovery for determination of Pb and Cd by standard addition method were 99.5% and 103.5% respectively with the RSD(n=6) less than 5.0%. Conclusion: It was proved that the method is of high sensitivity and good stability

the precision and accuracy requirements are both suit for the determination of Pb and Cd in Bombyx Batryticatus.