Method for rapidly changing desert at periphery of water source of oasis of south Xinjiang into fertile farmland

The invention relates to a method for rapidly changing a desert at the periphery of a water source of an oasis in south Xinjiang into a fertile farmland. The method comprises the following steps: choosing a to-be-transformed desert area, building a water irrigation and drainage channel, roughly levelling and finely levelling, ploughing to the ultra-depth and exposing under the sunshine, irrigating with washing saline-alkaline, planting a salt-resistant plant, ploughing to great depth again, levelling, and conducting winter irrigation with the washing saline-alkaline; when the salt content of the soil of a plowing layer is 2.5-8.7 g/kg, a grain or cotton crop variety with relatively stronger salt tolerance is chosen to be planted; when the salt content of the soil is 8.8-13.8 g/kg, the salt resistant plant is continued to be planted; and when the transformation area is small and the investment is low, the wild lycium ruthenicum, sea-buckthorn, sophora alopecuroide, liquorice, populus diversifolia, halimodendro