▎ 摘　　要

NOVELTY - A soil repairing agent comprises inorganic restorative agent, organic restorative agent and hydrogel in a mass ratio of 2:1:3. The inorganic restorative agent comprises 40-50 pts. wt. steel residue, 20-30 pts. wt. zeolite, 15-20 pts. wt. montmorillonite, 1-5 pts. wt. rare earth and 0.5-2 pts. wt. graphene. The organic restorative agent comprises 70-75 pts. wt. citric acid, 5-10 pts. wt. malonic acid, 6-8 pts. wt. EDTA and 8-10 pts. wt. aminodithiocarboxylic acid type chelating resin. The hydrogel is starch-based hydrogel. USE - Soil repairing agent. ADVANTAGE - The soil repairing agent has excellent and stable soil repair effects, effectively removes heavy metal ions from soil, and provides fertilizer for plant growth to a certain extent.The compostion has enviornmental friendly effect DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of soil repairing agent, which involves (S1) preparing inorganic restorative agent by mixing steel residue, zeolite, montmorillonite, rare earth and graphene, heating under nitrogen atmosphere at 600-700 degrees C for 3 hours, cooling and grinding into powder, (S2) dissolving citric acid, malonic acid, EDTA, aminodithiocarboxylic acid type chelating resin in water, stirring for 30 minutes, heating at 70-80 degrees C and cooling to obtain organic restorative agent, (S3) dissolving inorganic restorative agent and organic restorative agent in water, slowly adding hydrogel, warming up to 70-75 degrees C, insulating under nitrogen atmosphere for 3 hours, cooling to room temperature, removing product gel, completely removing the moisture in the gel by vacuum-freeze-drying, crushing the dried product and sifting to obtain soil repairing agent with uniform particle size.