Abstract: In terms of the data of stratiform could microphysical structure from airborne particle measurement system(PMS) in 1997 in Liaoning province,the characteristics of cloud droplet spectrum,particle number concentration,temperature and water content of particle in the horizontal level were discussed.The results indicate that the number density and radius of cloud droplet in the horizontal level fluctuate strongly.Temperature changes little,while the spectrum structures of cloud droplet fluctuate strongly with three patterns.Water contents of stratiform cloud vary greatly,and have close positive relationship with particle number concentration.