Waste gas detection device convenient to install

The utility model discloses a waste gas detection device convenient to install. Mounting base, a mounting groove is formed in the top of the mounting base; a waste gas detector is mounted in the mounting groove in a sliding manner; the top of the waste gas detector extends out of the mounting groove; grooves with openings in the tops are formed in the inner walls of the two sides of the mounting groove; fixing blocks located in the mounting groove are welded to the two sides of the waste gas detector correspondingly. The two fixing blocks are installed in the two grooves in a sliding mode respectively, clamping grooves are formed in the sides, away from each other, of the two fixing blocks, sliding grooves are formed in the inner walls of the sides, away from each other, of the two grooves, clamping rods are installed in the sliding grooves in a sliding mode, and one ends of the clamping rods extend out of the sliding grooves and are installed in the clamping grooves in a sliding mode;the device is simple in