Double-light-path laser forward scattering particulate matter concentration measuring device

The utility model provides a double-light-path laser forward scattering particulate matter concentration measuring device which comprises an electrical unit box, a measuring probe rod and a receivingbox, and the electrical unit box is provided with a laser emitter and a laser processor; the measuring probe rod comprises a sleeve and a light path protection tube. An optical splitter is arranged inthe rear end of the sleeve; the optical splitter comprises a spectroscope and two lens cones. The front end of the lens barrel is provided with a protective lens. A fixed cover is arranged at the front end of the sleeve; a fixing ring is arranged in the middle of the sleeve; the fixing cover and the fixing ring are respectively provided with a protection tube hole and an optical fiber tube hole.An optical fiber tube is arranged in the optical fiber tube hole, a laser receiver is arranged in the receiving box, the laser receiver is provided with a receiving plate, an optical fiber is connected between the laser receive