Rhizosphere amendment used in acid heavy metal contaminated soil for preventing vegetables from absorbing cadmium and application of rhizosphere conditioner

The invention discloses a rhizosphere amendment used in acid heavy metal contaminated soil for preventing vegetables from absorbing cadmium and an application of the rhizosphere amendment. The rhizosphere amendment is prepared from 30%-40% by mass of fermented cow dung and 60%-70% by mass of chlorite mineral powder, wherein the pH of the fermented cow dung is 7.5-9.5, and organic substances account for 45 wt.% or more; the pH of the chlorite mineral powder is 9-11, and the chlorite accounts for 30 wt.%-50 wt.%. The fermented cow dung as agricultural organic waste can increase soil nutrients and the content of the organic matters and has good promotion effect on plant growth; mineral powder of industrial waste tailings contains various clay minerals, and heavy metal can be passivated by a porous adsorption structure; the rhizosphere conditioner with the fermented cow dung and mineral powder mixed can play a coordinate role in promotion of plant growth and fixation of transferring of the heavy metal in soil whe