The daily precipitation data in Liaoning, daily NCEP/NCAR reanalysis data, and Subtropical High (SH) data are employed to investigate the relationships among the SH ridge, the northern and western boundaries of SH, upper and low level jets, stratification characteristics, and the starting/ending times, as well as the precipitation intensities and properties of six torrential rainfall processes occurred from June to August 2010 The results show that the SH ridge line was located averagely from 110°E to 130°E in July and August 2010, farther north than that in normal years for 81% probability, and the average position of the SH ridge line was 27° farther north than that in the same period of normal years. During the six torrential rainfall processes，the ridge line of SH was located between 27°N and 35°N, and the northern boundary of the 588 contour line near 130°E and the western boundary near 35°N were located between 38° and 45°N, 110° and 130°E, respectively. The heavy rain occurred when the jet core moved southwardly affecting Liaoning Province after the upper level jet reached its strongest phase in the background that the low level jet was well established and maintained. The forecast indexes are concisely summarized based on the characteristic analysis of facts, which provides reference for the like regional torrential rainfall forecasting in the future.