‘Zaohong’navel orange ［Citrus sinensis （L.） Osbeck + C. unshiu Marc.］ is a grafted chimaera of ‘Robertson’ navel orange ［C. sinensis （L.） Osbeck］ and ‘Guoqing 1’ satsuma mandarin ［C. unshiu Marc.］.The ‘Zaohong’ navel orange has the peels of a navel orange and the flesh of a tangerine.It has a good flavor that has made it a favorite in recent years.The effects of different rootstocks on the growth of tree and fruit quality of ‘Zaohong’ navel orange were evaluated to provide a scientific basis for growers of ‘Zaohong’ navel orange species to select the optimal combinations of rootstock.The ‘Zaohong’ navel orange was used to study the effects of three different combinations of rootstock including C. reticulata Blanco cv. Red tangerine （Rt）， Poncirus trifoliata Raf.（Pt）， and originally Poncirus trifoliata and then red tangerine（Pt+Rt） on the growth and the fruit quality of the oranges.The results showed that there were differences in photosynthesis and its products， the growth of tree， fruit yield and quality of ‘Zaohong’ navel oranges grafted on different rootstocks.The content of soluble sugar in leaves， the concentration of intercellular CO₂ and the stomatal conductivity were in the decreasing order of Pt>Pt+Rt>Rt.The growth of tree and fruit yield， plant height， crown diameter， shoot length， leaf size and fruit yield were in the decreasing order of Rt>Pt+Rt>Rt.The fruit quality including the content of soluble solids and total acid in Pt was higher than that in the other two combinations.There was no significant difference in the solids-acid ratio of the different combinations of rootstocks.The fruit weight of Rt and Pt+Rt was larger than that of Pt.The fruit size of Pt was unstable among different years.It is indicated that Rt has stronger growth of tree， higher yield of fruit and weight of single fruit， with acid fixation ratio not inferior to that of Pt. Rt has better economic benefits and is suitable for promotion and use in the Three Gorges Reservoir area.