The invention relates to a radial plume multi-component gas measurement 
remote sensing system, which belongs to the field of 
laser remote sensing measurement, and includes a reflected 
laser acquisition unit and a 
data acquisition unit; the 
data acquisition unit includes a 
data acquisition card and a computer, and the reflected 
laser acquisition unit includes multiple  
Laser, the light of each laser is divided into two paths through the 
beam splitter, one path is irradiated to the first 
detector through the reference absorption 
pool, and the other path is irradiated to the 
beam expander through the beam combiner, and the cooperative target reflectors are arranged in sequence along the 
optical path  Mirror, reflector, first lens, and converge to the 
grating, where the separation of different wavelengths is realized, and the light of different wavelengths is incident on the second 
detector connected to the data acquisition card through the narrow-band filter and the second lens, and the laser  The number is more than two, and the laser is a modulated 
semiconductor laser, the scanning frequency is greater than 100Hz, and the modulation frequency is greater than 20kHz.  The invention has simple and compact structure and high sensitivity, and can detect the concentrations of various gases in the air in real time.