Gas interference simulation device and method for testing gas alarm

The invention discloses a gas interference simulation device and method for gas alarm testing, and belongs to the technical field of gas detection.The gas interference simulation device comprises a detection box, a gas alarm is placed in the detection box, the top face of the detection box is provided with a first gas inlet, and the side face of the detection box is provided with an exhaust outlet and a sealing plug matched with the exhaust outlet; a multifunctional gas analyzer is fixedly mounted in the detection box, the interference device is fixedly mounted in the detection box, and the interference device is used for detecting whether the gas alarm gives out an alarm sound or not in interference gas environments with various specified concentrations and conveying methane into the gas extraction box from the first gas inlet; the air cylinder pushes the first piston plate to extrude fuel gas into the first air pipe and the fuel gas enters the detection box, the multifunctional gas analyzer detects that the