Abstract: Objective To study on the relationship between vitamin A level and inorganic salts,trace element in serum of preschool children.Methods Absorption amount of energy and nutrients were calculated percapita daily by diet investigation,contents of vitamin A and trace element in serum were detected by micro-fluorescence and atomic absorption spectrometric respectively.Results There were no difference in absorption amount of diet nutrients daily between serum vitamin A normal group and deficiency group.Iron level in serum increased significantly after vitamin A was complemented for children who were deficient in vitamin A,while no effect on the levels of Zinc,Copper,Calcium and Magnesium.Conclusion Iron absorption state can be improved by complement vitamin A for children deficiency in vitamin A.