The soil permeability characteristics of shelter forest in silting coastal area is studied. The results are as follows:Soil permeability rate changed very much even in the same stand and in different plots. The primary permeability rate of forest land was very high

which can absorb a lot of precipitation. Whereas the stable permeability rate might be less than that of bare land. Soil permeability process of forest land followed logarithm curve and the correlation coefficient reached significant level. In addition

the permeability rate was mainly determined by content of organic matter and non capillary porosity in soil.