In last 50 years， the urbanization， land use and population expansion have a significant effect on the spatial and temporal changesof short duration precipitation in Beijing region. The observed data of the maximum 1h precipitation from 27 representative precipitationstations during 1956~2008 were used to analyze the spatial and temporal variation of short during precipitation in Beijing region. The resultsshow that the maximum 1h precipitation has an increasing trend in the north and west during the 53 years while there is no obvious change inthe east and south. As for the spatial variation， the east and south are two storm centers， with the largest precipitation rainfall in the east andthe second in the south. It is easy for the urban center to suffer from extreme rainstorms ， and precipitation is smaller in the north and west.