Based on the cloud structural characteristic parameters retrieved by FY2C satellite and radio sounding data, combined with precipitation on ground, the relationship between cloud parameters(including cloud top height, optical thickness, particle effective radius, depth of cloud, etc) and precipitation was studied.The relationship between frequency distribution of cloud parameters and precipitation during stratiform cloud precipitation process and convective cloud precipitation process was researched further.Results show that precipitation is usually easy on the ground when cloud depth is thicker than 5 km, cloud base is low, and effective cloud particle radius is large.When cloud top height is greater than 10 km, optical thickness exceeds 20, and there is no or very thin interlayer in cloud, the surface precipitation intensity is usually more than 1 mm/h.For the stratiform cloud precipitation, if cloud optical thickness value exceeds 17, the probability of precipitation on ground will be higher.With the increase of optical thickness, surface rainfall intensity shows an increase tendency.For the convective cloud precipitation, there is a good correlation between cloud top height and optical thickness.While optical thickness value exceeds 17 and cloud top is higher than 7 km, the probability of precipitation on the ground is greater.If the cloud optical thickness exceeds 20, surface precipitation intensity will increase significantly.Both the precipitation probability of stratiform cloud and convective cloud increases with cloud top height and optical thickness.The probability of precipitation is more related to optical thickness.Clouds of optical thickness value less than 10 are difficult to precipitate.If cloud optical thickness exceeds 20, precipitation probability of stratifo rm clouds and convective clouds will increase evidently.Comprehensive analysis of cloud top height, cloud thickness, optical thickness and other cloud parameters could be more effective to determine precipitation region and intensity on the ground.