The utility model relates to the field of detection equipment, and provides an optical interference gas detection device circuit which comprises a processor module, an image processing module, a light source module and a power supply module. The control output end of the process module is electrically connected with the control input ends of the image processing module and the light source module, a data port of the processor module is further electrically connected with a data port of the image processing module, and the power supply module is electrically connected with power supplying ports of the processor module, the image processing module and the light source module. According to the optical interference gas detection device circuit, a processor is used to automatically control and process the image processing module, a gas collecting pump valve module and the like, so that the intelligent degree of a total machine is high. A sensor module is arranged, according to parameters such as temperature and humidity can be collected by a sensor, and measuring results can be compensated correspondingly.