本文介绍了砂轮浸渗剂在干磨环境下的作用机理，即冷却、润滑、防堵塞和降低空气污染等作用，分析了磨削过程中浸渗剂与加工表面的反应及其效用。提出了硫、磷、氯系极压反应膜在生成条件、生成速度以及耐负荷性上的差异。提出了根据具体的加工条件和砂轮特性优化选择与之相适应的浸渗剂类型。 This paper introduces the mechanism of grinding wheel infiltrant in dry grinding environment, namely, cooling, lubrication, anti-clogging and reducing air pollution. The reaction between infiltrant and the machined surface during grinding is analyzed. The differences of formation conditions, formation speed and load resistance of sulfur, phosphorus and chlorine extreme pressure reactive films were proposed. According to the specific processing conditions and characteristics of the wheel to optimize the choice of the type of infiltrant.