The distribution map of the saline-alkali soils complied based on the 1 to 100000 and 1 to 250000 scale TM pictures reflects the real situation of the salinealkali soils during the middle and late 80's in Heilong-gang region. By calculation there are 393400ha of salt-affected soils of which over half is slight saline-alkali soils. Under the natural and anthropogenic effects, the area of the saline-alkali soils is obviously decreasing and its harm is lightenning, especially in the upper part of plain. This same trend is found in the coastal area, although the salinization is still very serious. By comprehensive analysis, the lightenning of the salinity improves the development of agriculture, forestry and animal husbandry in this region, but the descending of the underground water level and the shortage of water resources will bring out unfavorable effects on the environment quality. So it is necessary to combine agriculture, forestry and animal husbandry in this area to make the resources be fully and rationally utilized.