Based on the typhoon (TC) data in 1949-2016 and daily precipitation data of the surface climate data in China, (annual: June to October; monthly: July to September) mean precipitation characteristics in the western China under the background of TC activity and their landing are studied by using the statistical analysis and long sample data. The results are as follows: (1) In 67 years, the annual average number of the TCs landing on the mainland of China is 9.09. The active phase of typhoons is June to October. The TC landing appeared first in April and the latest in December, and the highest frequency of the landing typhoon is in August. (2) Typhoon activity has a significant impact on the precipitation in Ningxia, Shaanxi, the Sichuan Basin, the central and eastern Gansu and Qinghai. The numbers of typhoon activities are positively correlated with the precipitation in the corresponding areas. The precipitation in Xinjiang and the Tibet is very little affected by typhoons, and in Guizhou and Chongqing, the correlation is reverse. TC activities have little effect on precipitation in Yunnan. (3) TC activities are positively correlated with precipitation in some parts of the western China, which is the most significant for the annual average precipitation, followed by the precipitation from June to October. The characteristics of longdistance TC and precipitation in the western China are focused in this study, which will help systematically and comprehensively understand the characteristics of TC activities, the relationship between landing TC and precipitation in the western China and the mechanisms of precipitation in the western China.