Effects of mangroves restored in different years on physical and chemical properties of coastal soils were studied. Results showed that the effects on deep soils(20-25cm)were more significant than surface soils(0-5cm). Eh values of 20-25cm soils under mangrove forests were higher than those of barren soils. Restored mangroves strongly assimilated nutrients from soils to accelerate their growth. The contents of NH₄⁺-N were higher than those of NO₂^--N and NO₃^--N and NH₄⁺-N was the main inorganic nitrogen assimilated by mangroves. Although its contents were nearly the same as the inorganic nitrogen, PO₄^3--P was assimilated little. As mangroves grew, pH values at depth of 20-25cm decreased significantly and soil acidification was strengthened. There was no significant difference in SO₄^2- contents among the surface soils but at depth of 20-25cm, the contents of the soils under mangrove forests was higher than those of barren soils.