The correlation of exploration,mining,ore blending,processing and smelting sectors,which are considered to be series-coupled in mine engineering,is considered to be principal for mines. The corresponding geological grade,mining grade,milling grade,concen-trate grade,charged grade all plays an important role in the general economical benefits of mines. Based on Five Grades Ganged(FGG)theory,an economic effectiveness model for min-ing grade benefits was established. The proposed model obeys the principle of ore conservation and metal conservation. Grade-profit activity index was proposed and analyzed via an example. The grade of optimization of a certain metal mine was obtained and the proposed model would establish a foundation for further study of the management mode in mining enterprises.%本文以五品联动理论为研究背景，考虑到矿山工程中地质工程、采矿工程、配矿工程、选矿工程和冶炼工程5个工程是相互联系的串联耦合工程，是矿山企业活动的主体，而与其相对应的地质品位、采出品位、入选品位、精矿品位和入炉品位对于矿山整体经济效益起到关键的控制作用。本文运用并拓展了“质量守恒”原理，利用“矿量守恒”和“金属量守恒”建立了品位经济效益模型，提出了五品联动品位-效益活跃指数，通过实例计算与分析，获得了某铁矿的品位优化数值，为进一步研究矿山企业工程管理模式奠定了基础。
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