Abstract:The CaO content distribution of geochemical samples was investigated using Excel2013 and minitab softwarw. The quality estimation of analysis data for geochemical samples in Guangxi province was made by using descriptive statistics, normal distribution, background values and anomalies methods. The results indicated that computer software and mathematical statistics methods could be used to quickly find the detailed information and characteristics of the analytical data, judged the accuracy of laboratory analysis data of geochemical sample, fould out the background and abnormal values of elements and eliminated the abnormal values. The result of the normal distribution test indicated that the analysis data of the trace elements need a logarithmic conversion before the normal distribution could be studied．compared with the X fluorescence method, the results measured by inductively coupled plasma emission spectroscopy are more consistent with the normal distribution.It was a valuable attempt to evaluate