Abstract: Objective To explore the clinical effect of vitamin D combined with diet and nutrition intervention in the treatment of children's health maintenance and promotion. Methods From February~2018 to May 2019,320 children with backward height were divided into two groups by double blind method. The control group 160 cases were treated with vitamin D only, the observation group 160 cases were treated with vitamin D and dietary nutrition intervention, and the clinical effect of the two groups was compared. Results The serum vitamin D level in the observation group was significantly higher than that in the control group, and the average height was significantly higher than that in the control group(P<0.05). The GMQ and PDI in the observation group were significantly higher than those in the control group(P<0.05). Conclusion The combined application of vitamin D and dietary nutrition intervention in the treatment of children's fitness and high promotion has significant clinical effects and is worthy of promotion.

Key words: child health, height, vitamin D, dietary nutrition intervention