Calibration device of sensor for monitoring carbon dioxide and working method of calibration device

The embodiment of the invention provides a calibration device of a sensor for monitoring carbon dioxide and a working method of the calibration device, and relates to the technical field of sensors.The device is characterized in that the first input end of a three-way electromagnetic valve is connected with a monitoring gas inlet, and the second input end of the three-way electromagnetic valve is connected with the output end of a CO2 filtering device; the output end of the three-way electromagnetic valve is connected with a sensor to be calibrated; the input end of the CO2 filtering device is connected with the calibration gas inlet, and the CO2 filtering device is used for filtering CO2 in the gas; the calibration module is connected with a sensor to be calibrated and is used for controlling the three-way electromagnetic valve to close the first input end and open the second input end when the sensor to be calibrated needs to be calibrated, so that air entering through the calibration air inlet passes throu