Abstract: In this study,conditions of breeding Pro-cambarns Clarkii were controlled.Samples were taken from cheeks,heatocirrhosis,venter muscles and cheliped muscles of these bred crawfishes,as the breeding time was 0,7,14,21,28,35,42,49 and 56 days respectively.Heavy metals including Cu,Zn,Cd,Pb and Cr of these samples and environmental water samples were quantitatively analysed by means of AAS.The results indicated that the occurrence rate of Cu,Zn,Cd,Pb,and Cr in the four parts of the crawfishes was 100%;Heavy metals accumulated in the crawfish increased slightly with the breeding days increasing.Thus,the view that the crawfishes spit out heavy metals is wrong.