The differences of growth and total soil mass water amount among different tree species were studied by large-scale weighing lysimeter in the whole process of rainstorm in Beijing from 21to 22July in 2012.At the same time

soil moisture content was measured in different depths of soil mass by soil three-parameter determinator and dynamic changes of the moisture content of every layers in soil mass were analyzed in the whole rainfall process.Results showed that soil mass water content in lysimeter presented the trend of slow growth after a jump under the rainstorm conditions.Soil mass water content for Acer elegantulum gained the most and leakage was the least

while for Pinus tabuliformis

just the opposite.The soil mass water content decreased in the order of A.elegantulum>Platycladus orientalis>space>P.tabuliformis.In different soil layers

they had a jump of moisture in rainstorm process.The jump in topsoil occurred earlier and increased more

while in deep soil layers

the opposite.At the end of rainfall

the soil moisture content of every layer for A.elegantulum was the most and P.tabuliformis was the least.The soil moisture content decreased in the order of A.elegantulum>space>P.orientalis>P.tabuliformis.