The utility model discloses a gas detection device which comprises a
machine body, the interior of the
machine body is connected with a moving plate through a moving mechanism, an air inlet hole is formed in the moving plate, a fixing plate is arranged in the
machine body, the interior of the machine body is fixedly connected with a second motor, the second motor is connected with a
transmission belt, and a detection mechanism is arranged. At the moment, impurities and
moisture in the gas are removed through the gas filter so as to protect the
detector and improve the detection precision, at the moment, the gas is detected through the
detector, after the
detector detects the gas, data are transmitted to the processor to be processed, then the data are transmitted to the display screen on the surface of the machine body, and component data in the gas are displayed; when the processor finds that the
gas concentration exceeds a set threshold value in the
processing process, the alarm gives an alarm to prompt an operator, the detected gas is exhausted through the exhaust hole in the right side of the machine body, and the cover plate is connected with the right side of the machine body through threads when the device is not used, so that dust is prevented from entering the device when the device is not used.