Abstract: In view of problems of data redundancy and uncertainty caused by mass data of mine gas monitoring and control system，the paper put forward a statistical analysis method of gas monitoring data. For historical data known time series, firstly, the method uses Matlab toolbox to draw histogram and cumulative graph of probability density function and cumulative distribution function to obtain statistical characteristics; secondly, it uses Crystal Ball software CB Predictor tool to assess the historical monitored data and to predict their future trends; finally, it analyzes the predicted result and obtaines detailed reports of forecasting method.