Abstract: Objective To investigate the influential factors of iodide goiter among children in Tianjin and to provide a scientific basis for intervention on the disease.Methods According to the water monitoring results and iodine concentration,thyroid condition of elementary students in area with high iodine was tested.Meanwhile the condition of iodized salt intaked of the students'family was inspected.Results Goiter rate of the students in high water-iodine area and high water-iodine endemic area were 8.1% and 5.8%,and there was no significant difference compared to those of normal area(χ²=2.50,P=0.114).Gender and age had influence on goiter rate of the students.Water iodine of iodide goiter group was higher than that of non-iodide goiter guoup in high water-iodine area and high water-iodine endemic area.Iodized salt consumption rate in high water-iodine endemic area was significantly lower than that of in high water-iodine area (χ²=21.97,P=0.000).Water iodine and salt iodine were main influential factors of local children iodide goiter and salt iodine was the most important factor.Conclusion To stop the supply of iodized salt and to improve the quality of drinking water in high water-iodine area in Tianjin could be effective interveation on iodide goiter.