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目的:及时掌握新碘盐标准实施后陕西省勉县重点人群碘营养状况及病情的消长趋势，为适时采取针对性防治措施和科学调整干预策略提供依据。方法:根据《全国碘缺乏病监测方案（2016版）》的要求，在全县范围内按东、西、南、北、中划分5个抽样片区，每个片区抽取1个乡镇/街道（至少包括1个街道），每个乡镇/街道抽取1所小学校，每所小学抽取8 ~ 10岁非寄宿学生40人（年龄均衡，男女各半）；同时，每个乡镇/街道抽取20名孕妇。采集学生及孕妇家中食用盐盐样及随意1次尿样，分别检测盐碘、尿碘含量，并检查学生甲状腺容积。结果:2016-2018年，共抽检盐样945份，合格碘盐937份，各年合格碘盐食用率分别为99.37%（313/315）、99.37%（313/315）、98.73%（311/315），盐碘平均数分别为24.32、24.74、27.93 mg/kg。共检测8 ~ 10岁学龄儿童尿样630份，各年尿碘中位数分别为200.2、189.1、214.0 μg/L；共检测孕妇尿样315份，各年尿碘中位数分别为184.8、154.4、195.4 μg/L。共检查8 ~ 10岁学龄儿童630人，其中甲状腺肿大8人，各年肿大率分别为1.43%（3/210）、2.38%（5/210）、0（0/210）。结论:勉县在落实好碘缺乏病防治措施的情况下，新碘盐标准能够满足人体的碘需求，应继续加强监测，及时掌握人群碘营养水平变化情况。“,”Objective:To grasp the iodine nutritional status and the disease trend of key populations in Mian County of Shaanxi Province after implementation of new iodized salt standard, so as to provide a basis for timely adoption of targeted prevention and control measures and scientific adjustment of intervention strategies.Methods:According to the requirements of “National Iodine Deficiency Disorders Surveillance Program (2016 Edition)”, the sampling areas were divided into east, west, south, north and middle regions within a county, and one town/street (including at least one street) was selected from each region, one primary school was selected in each town/street, and 40 non-boarding students aged 8 to 10 years (age balanced, half male and half female) were selected in each primary school; at the same time, 20 pregnant women were selected in each town/street. Salt samples and random urine samples were collected from students and pregnant women to test the content of salt iodine and urinary iodine, and the thyroid volume of students was examined.Results:From 2016 to 2018, a total of 945 salt samples were tested, and 937 were qualified iodized salts, the consumption rates of qualified iodized salt in each year were 99.37% (313/315), 99.37% (313/315) and 98.73% (311/315), and the average levels of salt iodine were 24.32, 24.74 and 27.93 mg/kg, respectively. Totally 630 urine samples of school-age children aged 8 to 10 years were tested, and the medians of urinary iodine in each year were 200.2, 189.1 and 214.0 μg/L, respectively; 315 urine samples of pregnant women were tested, and the medians of urinary iodine in each year were 184.8, 154.4 and 195.4 μg/L, respectively. A total of 630 school-age children aged 8 to 10 years were examined, and 8 with goiter. And the annual goiter rates were 1.43% (3/210), 2.38% (5/210) and 0 (0/210), respectively.Conclusions:After implementing the prevention and control measures of iodine deficiency disorders in Mian County, the new standard of iodized salt can meet the iodine need of human body. It should continue to strengthen monitoring and timely grasp the changes in iodine nutrition levels of the populations.