Based on ERA-interim reanalysis data and the daily meteorological precipitation data from 824 observation stations in China, we quantify and analyze the weather processes and the characteristics of precipitation contributed by the Sichuan Basin vortex during 1 January 1983 to 31 December 2012. The results suggest that the vortex usually occurs in the southwest or the northeast of the Sichuan Basin, which are referred to as southwest-type and northeast-type vortices, respectively. The vortex occurs most frequently in summer and least frequently in winter. The southwest-type vortex occurs most frequently in July and least frequently in January and December, while the northeast-type occurs most frequently in June and least frequently in January. The frequency of the vortex varies significantly in terms of its timing throughout the day; the southwest-type occurs more frequently at night than during daytime from March to October, while the northeast-type has the same pattern but from April to September. There is a significant correlation between the lifespan of the vortex and its convection; however, the southwest-type is still able to maintain even if the convection is not reinforced. The vortex moves out of the Sichuan Basin most frequently in summer and least frequently in winter; moreover, it advances on an eastward path before July and a northeastward path after July. There is a significant correlation between the frequency of the vortex and wind disturbance in the cradle land of the southwest-type vortex; the wind disturbance in the Jiulong region moves out of the cradle land actively in summer but less actively in winter, while in the Xiaojin region it moves out of the cradle land actively in spring and less actively in winter. The wind disturbance in the Jiulong region contributes more to the frequency of the vortex than it does in the Xiaojin region. The daily precipitation distribution contributed by each type is different during May to October; the maximum precipitation area of the northeast-type remains stationary while the southwest-type moves regularly. Although the northeast-type occurs less frequently, it brings more daily precipitation than the southwest-type.