Abstract: The project of “Weather Modification Capacity Construction Project of Northwest China-Hail Suppression Research and Field Campaigns in Bayannur” has been implemented in Bayannur area of Inner Mongolia from December 2018 to December 2021. The team built ground-based instruments including dul-polarization weather radar, 2DVD, hail pad etc.. This experiment carried out field research test based on scientific and reasonable equipment layout and observation methods, and established a technical system suitable for the characteristics of artificial hail suppression operations in Bayannur of Inner Mongolia, China. The project adopted C-band Doppler radar and ground hail data to analyze the temporal and spatial distribution characteristics of hail in Bayannaoer area and the movement path of hail cloud. The results showed that hail weather of Bayannaoer area mainly occurs from June to August, at 12-20 o’clock in the Hetao area. The main hail cloud movement path is from northwest to southeast(43%), followed by west to east (28%). The study analyzed the characteristics of hail on the ground observed based on the hailpad in 2019. According to the collected data, the diameter of hail particles ranges from 19.9 mm to 3 mm. The overall situation could be well described in the hail area, and the distribution of the number of hail particles is similar to the index. The fitted exponential distribution coefficient is N₀=6349, θ=0.4153, and there is a“left truncation” phenomenon when the particle diameter is 5 mm (the number of particles in the 3-5 mm diameter interval is small), and the main causes of the errors are the overlap of pits, manual data reading and other factors.