Abstract: Objective To investigate the effect of trace elements and nutritional intake on height and weight in preschool children. Methods Total 300 preschool children in different kindergarten from September,2013 to September,2014 were chosen and divided into excess group,good group,middle group and low group according to the diet intake for 3 days,with 75 cases in each group.The dietary status of children was followed up for 12 months.The growth indexes in different groups were compared and the correlation was analyzed. Results The numbers of children in each group were 48 cases,56 cases,57 cases and 47 cases,respectively.The height and the height increment of the good group were higher than those in other groups (P<0.05)12 months later;there was no significant difference in height and height increment between the excess group and the middle group (P>0.05),while either of them was higher than the low group (P<0.05).The weight and the weight increment of the excess group were higher than those in other groups (P<0.05)12 months later;there was no significant difference in weight and weight increment between the good group and the middle group (P>0.05),while either of them was higher than the low group (P<0.05).There were positive correlation between the growth index (height and the weight) and the nutrition (protein,energy,calcium,iron,zinc,all P<0.05),and calcium,iron,zinc and protein and caloric intake was positively correlated (P<0.05). Conclusion The trace elements and nutrition of rational consumption in preschool children has a positive role in growth and development,and deficiency or excess of nutritional intake have a negative impact on its height growth.It's necessary to develop individualized intervention according to the lack of nutrition conditions.