Secondary salinization of farmland is serious in Xinjiang. Measured from the Soil Map of Xinjiang in Scale of 1: 1, 000,000,
salinized farmland area in the whole Xinjiang is 1.263 ×106hm2,and occupies 31. 1 % of the total farmland area of 4. 067 ×106ha, in which the areas of serious salinized farmland, mesosalinized farmland and slight salinized farm land occupy 18%, 33% and 49% respectively. Tarim Basin is surrounded by mountains,and the original soil here contains salt universally. Thus, salt accumulation is violent due to the shortage of pathways for groundwater and salt, extremely arid climate, less precipi tation and violent evaporation.This paper analyzes the relationship between salt accumulation in soil and evaporation of the marginal zone in the oases in
Tarim River basin. The features of salt accumulation in the soil are as follows: (1 ) Salinization or alkalinization of soil here is universal, the area of saline soil is vast, and the degree of salinization or alkalinization is high. In the ir reclaimed desert regions, salt content is universally high in the surface soil, and generally,hard salty surface in a thickness of 5~15cm is formed in some part of the region and its salt content is as high as 50~80%. Even is in the irrigatied areas,
secondary salinization of soil exists to varying degrees. (2) The speed of salt accumulation in soil is rapid. Some measures are put forward for controlling the salinization of soil in the paper.