The invention provides a wheat-corn double cropping symbiotic cultivation method based on combination of irrigation with saline water and buried pipe drainage and salt elimination technology, so that soil moisture is effectively replenished in spring, accumulated salinity is removed in summer, an interannual accumulation rule of soil salinity of a saline and alkaline land plough layer is changed,and a 'wheat-corn' double cropping cultivation mode is realized. The method comprises the following steps of: A, embedding a buried pipe in field; B, exporting saline water; C, planting winter wheat;and D, culturing and planting summer corn. According to the method, an irrigation and salt elimination system network is designed in the field, and a specific planting method is combined to ensure the moisture demand of wheat and corn. Finally, the 'wheat-corn' double cropping plantation in a moderate saline-alkali soil is realized.