Drainage, salt elimination, infiltrating irrigation and fertilization integrated device

The utility model relates to a flood drainage, salt elimination, infiltrating irrigation and fertilization integrated device which comprises a main pipe, a connecting pipe, a branch pipe, a capillary pipe, a reservoir, a vacuum pump and a water injection pump. The main pipe is obliquely buried under the earth surface; a plurality of connecting pipes are arranged above the main pipe and are uniformly distributed; the branch pipes are horizontally arranged above the connecting pipe, and the branch pipes on the connecting pipe are located on the same horizontal plane; the plurality of capillary tubes are uniformly distributed between the adjacent branch tubes, and water holes are formed in the capillary tubes; the reservoir is arranged on one side of the lower end of the main pipe and is communicated with the main pipe; one end of the vacuum pump is communicated with the lower end of the main pipe; and the other end of the water injection pump is positioned at the bottom end of the reservoir. Compared with the p