[Objective] The effect of potato starchy residue on corn seedling growth and soil nutrient preserving characteristics were studied to provide a way to utilize the residue.[Method] The plant height, stem diameter and dry weight of corn seedling and soil bulk density, total porosity, capillary porosity, aeration porosity, moisture content, field moisture capacity, capillary water holding capacity, nitrogen fertilizer, leaching of phosphorus and potassium of sandy loam soils were determined in sandy loam soils potato starch residue of 0, 1.00, 5.00, 10.00, 20.00, 30.00 g/kg with indoor artificial natural environment and injector tube leaching method.[Results] Soil bulk density, soil porosity and soil moisture content of the treatment with 30 g/kg of starch residue had significant changes compared with CK. Soil volume weight decreased by 7.24%, soil total porosity increased 10.15%, soil moisture content increased 21.25%. The leaching of soil nitrate nitrogen, ammonium nitrogen, available phosphorus and available potassium content decreased 97.13%, 91.03%, 63.85% and 66.40% respectively. Corn dry weight of seedlings was increased by 13.47%, corn fresh weight of seedlings increased by 15.79%, corn plant height of seedlings decreased by 8.90%, corn stem diameter increased by 25.53%.[Conclusion] The suitable amount of potato starch residue applied in sandy loam soils was 30.00 g/kg, which could improve the soil physical and chemical properties and enhance the ability of preserving fertilizer and promote the dry matter accumulation of corn seedling.