In order to further study the mechanism of liver toxication caused by cadmiun and the role of selenium antagonism to cadmium, ninety 100-day-old cocks were used as experimental animals, and a certain concentrational cadmium and selenium were added in the basic diet.The hypo-ultrastructural changes of liver demonstrated that cadmium can make hepatocyte damage, cytoplasm atrophy, endoplasmic reticulum loose and fusion with membrane, ribosome,mitochondria,chromatin and nucleus atrophy.Many hepatocytes become n...