Series of concrete cube piles，which are buried in four different types of coastal soil with the gradient of permeability and also below the groundwater perennially，are tested. It shows that rebase are slightly corroded while no carbonization happens，the distribution of chloride is in an apparent rule according to the different soil conditions and the strength of concrete are reinforced. Those testing results are analyzed and it concluded that the corrosion condition of concrete is related to the permeability of soil， soil with lower permeability is better in resisting chloride and sulfate. Reinforced concrete，which is buried in the soil with low permeability and also below the groundwater perennially，is not easy to be corroded.