Abstract: In order to discussing the difference of the correlative endogenous hormone contents of dwarf peach、affording theoretical basis to choosing and breeding excellent dwarf cultivars which have the virtues of dwarf density planting、high quantity and quality, the general type of peach “Chunyan”，spur type “Super red spur” and dwarf type “P.persica var.densa ” were used to study the correlation between correlative endogenous hormone contents of IAA、GA、CTK、ABA in leaves of peach and length of internodes in different growing type peaches．The results showed that the difference of the contents of IAA, GA, CTK, ABA, the ratios of GA/ABA, IAA/ABA, IAA+GA+CTK/ABA, CTK/GA in leaves of peach among different type peaches all achieved fearfully marked level; it had negative relativity between the contents of IAA, GA, the ratios of GA/ABA, IAA/ABA, IAA+GA+CTK/ABA and tree dwarfing in three types peaches; it had marked negative relativity between the content of CTK and tree dwarfing. It had marked positive relativity between the contents of ABA, CTK/GA and tree dwarfing.