Abstract: Although there are many methods to forecast the coal and gas outburst, the accuracy is not very high. On the basis of summing up the results of previous studies, the gas concentration datum of Pingdingshan Tian'an Coal Industry Company No.10 Coal Mine are analyzed in this paper.Using Matlab software to process model programming and data, the reasons for the inconsistency of curve and the applicability of the data modal are analyzed. The actual data of experiment research shows that deviation rate and the variance are more practical, and for the broader.However,the interference affected by amplitude change rate is larger,and it is easy to lose effective important information.