Some experiments indicated that there is J-shape relationship among morbidity and mortality of cardiovas-cular diseases and salt intake.Its main causes are:(1)methods of measuring sodium intake are not the same;(2) The sensitive for individual is also not the same;(3)There are influence of other dietury factors related cardiovas-cular disease.This article reviews related discuss.%一些实验显示盐摄入量与心血管病发病率和死亡率之间呈 J 形状关系，不同的心血管病事件与盐摄入量的关系也不相同。其原因主要有：（1）钠摄入量测定方法不统一；（2）个体对盐的敏感性不一；（3）还受与心血管病有关的其他膳食因素的影响。本文综述有关的论述。
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