Formaldehyde detector preposed device capable of resisting VOC (volatile organic compound) interference

The utility model relates to an anti-VOC (volatile organic compound) interference formaldehyde detector preposed device which comprises a catalysis module and a temperature control module, and the temperature control module comprises a temperature sensor, a heating rod, a temperature controller and a heat accumulator; the catalysis module comprises a catalyst reaction bed and an air purification catalyst; wherein the heat storage body is provided with a hollow cavity, and a space used for containing the heating rod and the temperature sensor is further formed in the heat storage body or in the position close to the heat storage body; the temperature sensor is used for detecting the temperature of the heat accumulator, a temperature detection signal of the temperature sensor is sent to the temperature controller, and the heating rod heats the heat accumulator under the control of the temperature controller; a main body of the catalyst reaction bed is positioned in the hollow cavity of the heat accumulator, and