Based on the randomly contolled experimental data of 75 rural primary schools in Qinghai Province and Ningxia Hui Autonomous Region and by making use of an analytical research method in e-conometrics,we find that nutritional interventions have positive impact on improving academic perform-ance and the health status of rural pupils.Among the different interventions,providing the vitamin tab-lets for rural pupils in poor areas has very positive impact on improving the academic performance.%利用对西部地区青海省和宁夏回族自治区的75所小学的随机控制实验数据，运用计量经济学分析方法研究发现，营养干预对降低学生贫血率，提高学习成绩有正面影响。而在不同干预手段中，为学生免费提供富含多种微量元素的维生素片对提高学生的学业表现有较为显著的正面影响。
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