Abstract: Carotenoids are the secondary metabolites of citrus. The composition and content of carotenoid in citrus directly determine both the appearance value and nutritional function of citrus fruits,therefore,it is an important index for evaluating the quality of citrus fruits. The present review summarizes the recent studies about the accumulation mechanism,analytical methods and processing stability of citrus carotenoids. Specifically,the biosynthetic pathway,cumulative influencing factors,composition analysis methods and processing stability of citrus carotenoids are clearly describted. This review provides useful information for further studies on component analysis and processing stability of carotenoid in citrus.