The analysis of cloud macro and micro physical characteristics was conductive to improve the understanding of cloud bodies and provide technical support for local scientific artificial precipitation enhancement. The microphysical characteristics of stratiform cloud were analyzed by using an aircraft detection data and sounding data in middle region of Inner Mongolia on May 10, 2018. Affected by 500 hPa upper trough and Hetao cyclone, a stable stratiform cloud precipitation occurred in middle region of Inner Mongolia. The number concentration of precipitation particles and cloud particles were small in the middle and lower part of the stratiform cloud, and the vertical and horizontal distribution of cloud microphysical parameters showed obvious heterogeneity. The cloud particle spectrum presented a single peak distribution and generally a decreasing trend. The aircraft detection data showed 63.53% of cloud water content was greater than 0.002 g·m^-3, 83.2% of super-cooled water content was greater than 0.010 g·m^-3, and the super-cooled water content ranged from 0.010 to 0.050 g·m^-3. There were areas with small natural ice crystals and relatively abundant super-cooled water in cloud with lower temperature, which had good crystal introduction and catalytic potential.