To assess the feasibility of corn cob used as an additive material in filler soil, the physicochemical properties and nutrients leaching and adsorption characteristics of corn cob were studied and compared with those of other additive materials, including willow wood, ceramisite, and rice husk biochar, through physicochemical properties tests, leaching experiments, and isothermal adsorption experiments. The results show that corn cob is light and porous, with large specific surface area and high cation exchange capacity, and it has low nitrogen and phosphorus contents, and abundant oxygen-containing functional groups. With corn cob used as additive material, when deionized water was used in leaching experiments, the nitrogen and phosphorus leaching quantities were low, and the leaching speed was fast; the leaching quantities decreased in stormwater runoff leaching experiments, and the leaching speed of nitrogen slowed down. Under the typical stormwater runoff condition with the nutrient mass concentration of 2mg/L, corn cob adsorbed NH⁺₄ of 25mg/kg and PO3-₄ of 79mg/kg, demonstrating its better effect on nutrient adsorption than other additive materials. In conclusion, it is feasible for corn cob to be used as a filler soil additive material in bioretention facilities, which can reduce the nutrients leaching risk from filler soil and improve the effect of bioretention facilities on the removal of pollutants from stormwater runoff.