Based on simulated field experiments,this paper provided information about the changes of the content of 17 amino acid and total amino acid in tobacco leaves under the treatment of Cd、Fe、Cd+Fe and Fe+Cd.The results showed that the types of amino acid did not change under the treatment of Cd、Fe、Cd+Fe and Fe+Cd;Amino acid content increased with the increase of Cd concentration;the effect of Cd on amino acid content was more significant than that of Fe;the effect of Cd on amino acid content was inhibited by Fe...