Zinc deficiency in 6-month-old babies can be supplemented with the following measures: First, treat the primary cause of the disease. Diarrhea due to various causes can prevent zinc absorption, so infants with diarrhea should be treated for diarrhea and supplemented with zinc at the same time. Second, dietary treatment, give the infant more food rich in zinc, such as animal liver, fish, lean meat, egg yolk, etc. Colostrum is rich in zinc. Third, zinc supplementation, commonly used zinc gluconate, zinc lysine gluconate granules, zinc licorice granules, the daily dose of elemental zinc, 0.5-1mg/kg, equivalent to zinc gluconate 3.5-7mg/kg, the course of treatment for 2-3 months.