Abstract: Using climatic statistical methods, based on the data of 11 observation stations in Tangshan, the change characteristic of annual precipitation of different districts was analyzed. And from different angle of year, quarter and month, the rate of average relative precipitation of different districts was analyzed nearly 50 years. The results showed that: Over the past 30 years, the average annual precipitation reduces 8.5%~22.4% than the average annual rainfall. The reduction of coastal areas is most, but reduced extent of precipitation in the main crop growing season did not exceed 10%. At the year angle, the change rate of precipitation is 20.1%~3.0%, and the relative change rate of precipitation is gradually decreasing from the eastern coastal areas to the northwest. At the quarter angle, the change rate of precipitation of spring, summer, autumn and winter is 57%~8%、38%~8%、24%~1%、37%~2% respectively, the change rate of precipitation of spring is most. At the month angle, the change rate of precipitation in January and December is most, more than 100%. The change rate of precipitation May to September is least, the change range is 40%~60%, the change range of July-August is about 40%, and the other is 60%~90%.