The microphysical characteristics in high supercooled water area (higher than 0.1g.m^-3) in autumn's strait form cloud over Shandong were analyzed by means of the datafrom measurements with the particle measuring system (PMS) during 11 flights. The maxi. mum water content is 0.369.m^-3, 84.0% of supercooled water contents is between 0.1 and0.2g.m^-3, 86.1% of continual distribution width of supercooled water is less than 3km.The shapes of snow crystals mainly is graupel and smaller snow crystals. The cloud dropletscale spectrum can be fitted best by two-order Гfunction, and content spectrum can be fittedby log-normal function.