Abstract: Hong Jiang sweet orange" is graft chimera of sweet orange(Citrue sinensis(L)Osbeck)and mandarine(Citrus reticulate Blanco),Which emerges as the fruit of variation type known as red flesh of orange type,red-yellow flesh of chimera fruit of orange type an dveriation of chimera mandarine,Besides two types of fruits,Orange type of yellow flesh fruit and fruitwith variation of mandarine have returned to the fruit of two grafting.Significant correlation appears on rhe part of red flesh of orange type,yellow flesh of orange type and variation of mandarine Jruit,their respective characters being related to that of the leaf.In production character of the leaves can be utilized to judge accurately the variation plant of "Hong Jiaang sweet Orange" from its seedling stage and thereby eliminate the plant and its branches of two different crafting.