Abstract: The article presented three false data types of the current monitoring system, and analyzed “high value ” phenomenon of system data caused by electromagnetic interference, and proposed identify method and model for false data caused by electromagnetic interference. It introduced a method of establishing model's upper limit alarm value by combined concentration sequence of the gas sensor with the corresponding state of shearer on-off sensors. For identified gas concentration false data, it presented that using improved moving average method to compensate concentration sequence of the gas sensors, and verified the results.