The change of p recip itation at 84 meteorological stations in Beijing, Tianjin and Hebei in recent 47 yearswas analyzed by using linear regression, abrup t change analysis and wavelet analysis in this article. The results showed that annual p recip itation decreased at a climatic tendency of - 15 mm /10 a, and the 11 - year runningmean curve indicated the trend would continue in the future. Precip itation in summerwas decreasing inmost of the areas, while increasing in the other seasons. The abrup t change occurred in summer p recip itation during the early 1990 s. Generally, both annual and seasonal p recip itation p resented four periodic change of three,
nine, fourteen and twenty - four years.