Cotton is the world's most important source of renewable fiber, and it is largely utilized in the textile industry to make clothes. In contrast to the ovule epidermis, cotton fibers are single cells that have differentiated from it, making them an attractive model system for the study of polyploidization, production of cell wall and elongation of cell. Plant hormones, that are present in very small low quantities in the plant, play essential roles in a variety of developmental processes, and new research has found that hormones play a critical role in controlling cotton fiber formation, as well as other developmental processes. For example, it has been demonstrated that the exogenous administration of hormones can stimulate the start and development of fiber cells. However, there is currently a lack of a thorough knowledge of phytohormones that regulate the formation of fiber. This paper focuses on latest developments in the understanding of the roles of different phytohormones involved in fiber development, including brassinosteroid, gibberellin, cytokinin, auxin, ethylene and abscisic acid. This paper reviews the discovery of genes associated in hormone biosynthesis and signaling pathways, as well as the methods by which these phytohormones control the commencement and elongation of fiber cells in cotton. All of the hormones involved in fiber formation are beneficial; however, cytokinin and abscisic acid are detrimental. Auxin, gibberellin, brassinosteroid, ethylene, jasmonate, and strigolactones are among the hormones involved in fiber development. A complete analysis of the function of phytohormones in cotton fiber development is our goal.