质量守恒定律是化学变化中的一条重要定律，它从量的方面反映了化学变化的规律，它是配平化学方程式的前提与依据。因此，正确地理解质量守恒定律，对于培养同学们定量研究问题的能力和逻辑推理能力具有重要的意义。现就近年来各省市中考题中有关质量守恒定律的应用予以归纳， The law of conservation of mass is an important law in chemical change. It reflects the law of chemical change from the aspect of quantity. It is the premise and basis for balancing chemical equations. Therefore, a correct understanding of the law of conservation of mass has important implications for cultivating students’ ability to quantitatively study problems and their logical reasoning ability. The application of the law of conservation of mass in the examination questions of various provinces and cities in recent years will be summarized.