Abstract:Plots of field experiment have been established in light，medium，and heavy sa～line- alkaline soil，as well as soda salinized soil on Bohai bay coast land during 1989-1994．Tamarix chinensis trees had been planted as a pioneer tree species in heavy saline soil to protect dams from tide for 5 years．The content of soil salt in the dam of Dawa county，Panjing city declined from 1％to 0.4％．Elaeagnus angustifolia can be planted as pioneer tree species to resist alkaline and flood in Linghai city where the soil is solontz(pH is about 10)．In the medium saline-alkaline soil，the tree height of Populus popularis and Salix No．109 mixed with Amorpha fruticosa increased 3％and 10％respectively，D B H increased 12％and 25％ respectively，comparing with those in a pure stand．In the light saline alkaline soil，Populus popularis，Fraxinus velutina，Salix No．109，and Robinia pseudoacia can be planted so as to establish a fast—growing and high-yield plantation．