Choosing farmlands of different cultivated time in plain and oasis-desert ecotone in Qitai oasis,analyzes the temporal movement of soil soluble total salt,pH value,organic matter.The results show that Qitai oasis has already in a circumstance which is valuable for soil-salinization reversal evolvement,groundwater table is below 5 meters,the critical point which will affect the surface salt accumulation.Groundwater mineralization degree is lower than 3 g/L.With the decreasing of groundwater table and the increasing of cultivated time,the content of soil soluble total salt declined and organic matter enhanced,soilsalinization reversal evolvement has already occurred.Salinization reversal evolvement presents temporal and spatial characters,and can be classified as three different phases: the primary,the middle and the high-level.From the lower to the upside of Qitai oasis,the stage of soil salinization reversal evolvement gradually transfers to high-level.