采用压样法，使用国产便携式Ｘ射线光分析仪快速测定铝土矿火车样中的铝、硅、磷、硫、钾、钙、铁、钛８个元素。文章对标样的采集、制样、仪器某些性能的改进，各种影响因素的校正（如基体效应、谱叠加干扰等）、数学模型的研究开发等作了简要说明，提出了解决问题的基本原则，在小型仪器上攻克了铝土矿火车样工业分析的难题。该技术具有准确、快速、成本低的优点。 Using pressure sample method, 8 elements of aluminum, silicon, phosphorus, sulfur, potassium, calcium, iron and titanium in bauxite train were quickly measured by domestic portable X-ray photoanalyzer. The article briefly introduces the standard sample collection, sample making, the improvement of some performance of the instrument, the correction of various influencing factors (such as matrix effect, spectral superposition and interference, etc.) and the research and development of mathematical models. The basic principle, in a small instrument to overcome the bauxite train-like industrial analysis of the problem. The technology has the advantages of accuracy, speed, and low cost.