The present invention discloses an inversion method for 
laser radar data of atmospheric particulate matter particle size spectrum spatial and temporal distribution. The method comprises: by measuring back scattered 
echo signal of atmospheric particulate matters via 
laser radar, accurately inverting to obtain 
extinction coefficients of atmospheric particulate matters in three wavelengths of 
infrared, visible and 
ultraviolet bands at different heights from the ground; building lognormal distribution spectral functions of four 
aerosol components and parameters thereof, for obtaining refractive indexes at different bands of different aerosols and the 
mixing ratio of the four 
aerosol components in different 
aerosol modes; obtaining the particle size spectrum normalized at 0.55 micron of the 
extinction coefficient of each aerosol basic component, and comparing with a standard spectrum for 
authentication; and finally performing iterative calculation to the 
extinction coefficient spectrums obtained by 
laser radar surveying to obtain the aerosol mixed volume ratio of each height, thus obtaining atmospheric particulate matter 
particle size distribution of different heights at different times. According to the inversion method of the invention, valid data are provided for analysis and study of 
particle properties and variation patterns, especially, an effective means for spatial and 
temporal change detection for the particle-size spectrum of the atmospheric particulate matters is provided, and active three-dimensional 
telemetry technology suitable for atmospheric particulate matter 
particle size distribution is established.