本文研究了Ｘ射线荧光光谱在混合稀土氧化物和高纯稀土氧化物分析中的应用，并探讨了在常量分析中影响分析准确度和精密度的主要因素：样品及标样制备，基体效应校正方法和在痕量分析中降低检测限的方法：选择最佳测量条件，降低背景，与分离富集手段相结合，取得满意的结果。 In this paper, the application of X-ray fluorescence spectroscopy in the analysis of mixed rare earth oxides and high purity rare earth oxides has been studied. The main factors influencing the accuracy and precision of analysis in constant analysis are discussed: sample and standard preparation, matrix effect correction Methods and Methods for Reducing the Limit of Detection in Trace Analysis: Selecting Optimal Measurement Conditions, Reducing Background, Combined with Separation and Enrichment, Satisfactory Results.