Objective To investigate the iodine nutrition condition of school children,and provide scientific evidence for the prevention and cure of iodine deficiency disorders(IDD). Methods Urinary iodine and salt iodine were tested among samples of 200 children aged 8~10 which randomly collected in Xishan dtistrict according to geographical distribution.At the same time glandula thyreoidea touch and B-mode ultrasonography were accessed in sampled children. Results A totle of 200 salt samples and 200 urine samples were collected.The iodized salt coverage rate was 97.5%,with the pass percent of 93.0%,qualified edible salt was 95.4%,iodized salt median was 23.09 mg/kg and coefficient of variation was 22.4%.The results of urine iodine varied from 32.4 μg/L to 666.0 μg/L with a median of 144.6 μg/L.The percentages of urinary iodine less than 50 μg/L and 100 μg/L were 1.0% and 19.0% respectively.The percentage of urinary iodine more than 300 μg/L was 3.5%.A total of 200 children were inspected and two of them were found to be Ⅰdegree thyroid enlargement. Conclusion The iodine nutrition condition of school-aged children in Xishan district is generally at a suitable level,which reached the national standards for the elimination of iodine deficiency disease.