Abstract: Coal mine monitoring system networking is widely used in the field of coal mine monitoring, the advantage is that the system can monitor and aggregate system data from manufacturers and release unified real-time data and alarm data through the WEB server and query report historical data, etc. However, coal mine should carry out a large number of calibration work of sensors every day, calibration process will generate a lot of non-normal alarm data, which seriously disrupts the normal alarm data monitoring from bureau monitoring center and group monitoring center. How to shield off the alarm data during calibration becomes the important link to ensure the monitoring orderly.