[Objective] Effects of soil amendments with different addition amount on the amelioration of deicing salt damaged soil and its inflences on growth of petunia were observed to guide practical filed employment.[Methods] Three amendments, including spent Lentinula edodes substrate, Pleurotus ostreatus and gypsum were used in a soil column laboratory experiment. Soil pH value, EC, K⁺, Na⁺, Cl^-, bulk density and porosity were measured after the amendments were applied.[Results] pH values were observed significantly decreased in all amendment treatments. Shiitake mushroom(24 g/kg) had the best effect on decreasing soil EC. Pleurotus ostreatus effectively improved soil K⁺ concentration. Regarding the reducing of soil Na⁺, the amendments had a rank of Pleurotus ostreatus >Shiitake mushroom >Gypsum. Spent Lentinula edodes substrate(24 g/kg) had the best effects on decrease of soil Cl^- content, density and improvement of soil porosity. As compared with CK, the spent Lentinula edodes treatment decreased soil bulk density 57.3%, increased soil porosity by 24.6%, and the fresh weight of petunia in the treated soil increased by 244.64%.[Conclusion] Spent Lentinula edodes substrate(24 g/kg) was observed having the best effects on ameliorating of deicing salt damaged soil.