Objective To observe the curative effect of multivitamin iron oral solution combined with vitamin AD drops on the treatment of iron deficiency anemia in infants. Methods 336 cases of infants who was found with iron deficiency anemia for the first time were divided into two treatment groups (group A and group B) and one control group in accordance with their parents' will. Group A was treated with multivitamin iron oral solution combined with vitamin AD drops. Group B was treated with multivitamin iron oral solution combined with vitamin D drops. The control group was taken just dietary therapy combined with vitamin AD drops. All subjects were tested blood analysis after 4 weeks of treatment (within 3 days). The differences of the treatment excellence rates and the total effective rates were compared in the three groups. Results After 4 weeks of treatment, the excellence rate in group A was 71.70%. The total effective rate in group A was 97.17%. The excellence rate in group B was 41.05%. The total effective rate in group B was 90.30%. The excellence rate in control group was 6.25%. The total effective rate in control group was 32.29%. The differences of the treatment excellence rates and the total effective rates in group A were significantly higher than those in group B or in the control group. The differences were statistically significant (P<0.05). Conclusion Multivitamin iron combined with vitamin A can significantly improve the curative effect of the treatment of iron deficiency anemia in infants.