Abstract: For studying the micro features of cloud particles, a laser cloud particle imaging probe was developed by using laser imaging technology, homogenizing technology of Gaussian beam, and a high resolution array detector and a frame-extracting algorithm of image. The performance of the instrument was tested through simulation measure and actual flight experiment. The results show that for cloud particles of 25 μm~1550 μm with 25 μm resolution can be imaged with the developed instrument, and the error of particle-size measured is less than 9.5%. The particle shape of ice crystal watched conforms to the natural distribution of cloud particles, the particle-size distribution conforms to the exponential function with a determination coefficient between 0.58 and 0.97.The developed instrument can provide basic observation data for the study of cloud and precipitation microphysics.