Abstract: Soil nutrient changes and physiological responses of Photinia serrulata were investigated by using P.serrulata as a test material, combined with peat as a soil conditioner, in order to provide reference for the application of P.serrulata.The results showed that, under the conditions of planting P.serrulata,the addition of peat with a mass ratio of 5% could raise the pH of Cd-contaminated soil by 0.05 units and raise the organic matter content to 39.3%.Under Cd-contaminated soil conditions, P.serrulata enhanced its adaptability to Cd-contaminated soil by increasing the activities of osmoregulatory substances such as soluble sugars, soluble proteins and antioxidant enzymes such as superoxide dismutase, catalase and peroxidase.In Cd-contaminated soils, all indices of P.serrulata under combined application of plant measures（P.serrulata） + conditioner（mass ratio 5% peat） were more suitable for plant growth than the purely contaminated group.The addition of peat conditioner can effectively enhance Cd-contaminated soil′s pH and organic matter content.P.serrulata has a strong ability to adapt and self-regulate to heavy metal Cd stress in soil.Adding conditioner（peat） to Cd-contaminated soil can reduce the translocation and enrichment capacity of P.serrulata for Cd.