The effects of exogenous Spd on growth of wheat seeding under Cu²⁺stress was studied by exogenous ap-plication of Spd to Zhengmai 8.The results showed that exogenous Spd can alleviate the inhibition of Cu²⁺on wheatseedlings growth,and promoted plumule and radical growth of wheat.The Spd promoted the growth of wheat seed-lings in certain concentration of Cu²⁺,the elongation of plumule and radicle were 27.2%and 27.0%,and no obvi-ous effects on the numbers of radicle.The activities of SOD,POD and CAT of wheat were increased by 16.4%,10.6%and 12.5%than those without Spd groups,respectively.Exogenous Spd promoted the growth of wheat and in-creased the autioxidant enzyme activities under Cu²⁺stress,and alleviated the toxic effects of Cu²⁺on the growth ofwheat seedings.