Abstract: A new applicable tool will be provided for satellite detection of the conditions of precipitation enhancement. A precipitation process of stratiform clouds from 8 October,2018 was selected to analyze rainfall enhancement with FY-4A satellite retrieval products.The retrieval microphysical characteristics of the clouds are as follows: ①Most parts of Sichuan basin are covered with medium-low clouds with rich supercooled water, and some parts have high clouds, the effective radius(Re) of cloud base was 10~15μm ; ②The characteristics of cloud evolution from noon to dusk, cloud top were raised, the effective radius (Re) was increased, the clouds were rich in supercooled water but lack of ice crystals or large drops; ③Rainfall occurred under the participation of high clouds; ④There was a good opportunity for rainfall enhancement because of the existence of sustained and stable stratiform clouds.