【Objective】 To know the relation of constant and trace element and diet behavior of 1~7 years old childern in Yulin. 【Method】 7 396 children's constant and trace elements ages from 1~7 years old were measured,and compared with diet behavior. 【Results】 Zinc,iron,and calcium were in the biggest need.Zinc ranks the first(49.80%) in the 4 age ranges,iron ranks second(41.85%),calcium third(29.91%).There were significant difference about zinc,iron,and calcium between aged 1~3 and aged 3~7(P<0.05).Most children had bad dietary and behavioral habits.The levels of blood zinc and iron among the children with good dietary and behavioral habits were significantly higher than those among the children with bad dietary and behavioral habits (P＜0.05). 【Conclusion】 Lake of some constant and trace elements are common and related of diet behavior.The relevant media should increase the publicity and should be proposed in the diet structure and correcting bad diet behavior.