Abstract: Based on the daily precipitation data of 74 meteorological stations in Tibet, the precipitation characteristics, influence and meteorological service development from 21 to 25 September 2020 were summarized and summarized by using statistical methods such as linear regression and correlation coefficient. The results showed that: (1) The heavy rainfall process appeared in the northeast of Tibet, and rainstorm occurred at Nielam, Ando and Dingqing stations. (2) With early warning and early service for this continuous precipitation weather process, the linkage of different departments was strengthened, and achieved obvious meteorological disaster prevention and mitigation benefits. (3) The accurate forecasting and early warning and the linkage of various departments should be done in future decision-making meteorological service. Through strengthening team building and meteorological science popularization work for all ethnic compatriots, the meteorological department will perform the main duties better and do a good job in local meteorological services.