Abstract: 【Objective】 To analyze the changes of endogenous hormones during the growth and development of Xinjiang Malus sieversii forest under different health conditions, and to provide scientific basis for the research on the protection of Malus sieversii. 【Method】The contents of IAA, GA₃, ABA, ZR, JA in leaves and fruits of Xinjiang Malus sieversii with different development cycles, different years and different health conditions were determined by high performance liquid chromatography (HPLC). 【Result】From June to September, the contents of ZR and GA₃ in the leaves of normal Malus sieversii decreased, and the contents of JA, IAA and ABA increased. The contents of ZR, JA, GA₃, IAA and ABA in the degraded Malus sieversii increased. The normal fruits ZR, JA, GA₃, and IAA showed the same trend, and all showed a downward trend. Compared with those in 2017, the contents of ZR, JA and ABA in the leaves of normal Xinjiang Malus sieversii increased, and the contents of GA₃ and IAA decreased. The content of ZR and ABA in the leaves of degraded Malus sieversii increased, and the contents of GA₃ and IAA decreased. Normal and degraded endogenous hormone contents of fruits showed the same trend, and the content of JA increased, and the contents of ZR, GA₃, IAA and ABA decreased. Among the five Malus sieversii with different survival rates, the 100% survival rate of the leaves of Malus sieversii forest was the highest in IAA, ZR and GA₃, and the 20% survival rate of Malus sieversii forest leaves was the highest, 10% survival rate of Malus sieversii forest leaves was the highest. It can be seen that the higher the survival rate, the higher the hormone content that promotes growth. 【Conclusion】The contents of five endogenous hormones in Malus sieversii under two different growth conditions showed different trends in different months and years.