采用分层整群随机抽样方式，在占青海省总人口７５．５６％的２３个县（区）中，开展人群膳食硒摄入量调查，并进行食物硒与血硒关系的分析。结果表明，全省人群膳食硒摄入量均值为２５．９０μｇ／日，是杨光圻提出“膳食硒适宜量５０μｇ／日”的５１．８０％，是“生理需要量４０μｇ／日”的６４．７５％。五类食物中肉类硒含量最高，肉、乳类食物提供的硒占总摄入量的５４．５６％，肉、谷类食物硒摄入量是影响人体血硒含量的主要因素 A stratified cluster random sampling method was used to investigate dietary selenium intake in 23 counties (districts) accounting for 75.56% of the total population in Qinghai Province. The relationship between selenium and selenium in food was also analyzed. The results showed that the average dietary intake of selenium in the whole province was 25.90μg / day, which was 51.80% of the “suitable dietary selenium 50μg / day” proposed by Yang Guangtao and 64.75% of the physiological requirement of 40μg / day %. Five types of meat in the highest content of meat, meat, dairy foods provide 54.56% of the total intake of selenium, meat, cereal intake of selenium is the main factor affecting human blood selenium content