Abstract: With the continuous increase of peach planting area and the renewal of old varieties,the continuous cropping obstacle problem of peach garden is increasingly apparent.The development of peach industry is seriously restricted by the problems of weak tree growth,low yield and fruit quality,serious diseases and insect pests caused by continuous cropping.In order to further alleviate the continuous cropping obstacle of peach,this paper discussed the problem of autotoxicity in continuous cropping obstacle of peach,and summarized the causes,harm,action mechanism of autotoxic substances and the countermeasures of continuous cropping obstacle in peach orchard.