Yanqi basin is an important region of food production in Bazhou of Xingjian. Owing to the soil salinization the food crop yield is still not very high. The characteristics of salt accumulation in the soils are basically similar to those in the ground water, in which Na, Mg chlorides or sulphates are dominant. In addition, the accumutation of soda and magnesium carbonate in soil is commonly found in this region. (Far planning and developing agricultural production and comprehensive improvewent and reasonable utilization of the soils in this basin it is necessary to carry out soil regionalization.) On the basis of characteristics of topographical, hydrological and hydrogeological conditions and characters of soil salinization of the region, this basin is delimited into five regions of soil meliosation and utilization: 1. The region of diluvial fan of piedmant; 2. The region of diluvial-alluvial plain; 3. The region of Kaidn rives delta; 4. The region of southern and extern shores of Bohu lake; 5. The region of fishery and reed beds of Bohu lake.In order to prevent salinization of water in Bohu lake., some measures should be adopted such as (1) accelareting circulation of the lake water;(2) increasing the input of fresh water to the lake;and (3) controlling the salt content of the water input to the lake.