Abstract: X-ray Diffraction (XRD) is one of the most effective and commonest methods in crystal qualitative analysis. There are many factors affecting the analysis results, such as sample preparing, setting of the instrumental operating parameters. But the data analysis system is becoming the key factor in the modern instrumental analysis. There are three main software systems in XRD data analysis: EVA 12.0, X′Pert HighScore 2.0 and MDI Jade 5.0. In this paper, the advantages and the disadvantages of EVA 12.0, X′Pert HighScore 2.0 and MDI Jade 5.0 were studied and Evaluated. In this study the samples used in the analysis are high ash yield coals collected from Guizhou Province and Bruker AXS D8 Advance XRD instrument were used for XRD experiments. By comparing the analysis results, the similarities and differences as well as the advantages and disadvantages for these three softwares are evaluated. 