The invention relates to a treatment method for remediation of heavy
metal polluted soil by interplanting economic crops and leguminous plants. According to the method, the planted economic crops include sunflowers, corn, broomcorn and oilseed rape, the economic crops are subjected to
crop rotation through a conventional cultivation method according to a
sunflower-oilseed rape, corn-oilseed rape and broomcorn-oilseed rape mode, and the leguminous plants are interplanted through a conventional cultivation method during
sunflower-oilseed rape, corn-oilseed rape and broomcorn-oilseed rape planting periods. The soil is remediated through
crop rotation of various crops and the same kind of crops, and the monotonous mode of an existing
crop rotation method in which two crops are subjected to
crop rotation is broken through. The
crop rotation crops are reasonably matched according to the heavy
metal pollution problem of the to-be-restored soil, the aim of remediation of the heavy
metal polluted soil can be achieved, and meanwhile
soil nutrients can be effectively balanced. Meanwhile, the leguminous plants are interplanted to cooperate with remediation to serve as
green manure, and it is guaranteed that the remediated soil is high in beneficial component content. By means of the remediation method, considerable
economic benefits can be generated while the plants are planted for
soil remediation, and double benefits can be achieved.