Method for combined remediation of cadmium-contaminated soil through relay intercropping of wormwood and brassica juncea

The invention provides a method for jointly remedying cadmium-polluted soil by utilizing relay intercropping of wormwood and brassica juncea, and relates to the technical field of cadmium pollution remedying, and the method comprises the following steps: digging out underground rhizomes of old wormwood seedlings as wormwood seedlings at the beginning of March in early spring of the first year; ridging the land in spring of the first year; wormwood seedlings are planted on the ridges; first-season wormwood is harvested at the beginning of July in the first year, and stem bases are reserved during harvesting; second-season wormwood is harvested in mid-to-late October of the first year, and overground parts are not reserved during harvesting; turning over the argy wormwood, and sowing germinated argy wormwood seeds in the row spacing of the argy wormwood; in the end of February and the beginning of March of the next year, the leaf bud mouse ear mustard begins to grow quickly, and the wormwood buds begin to germi