 Taro is an important potato crop that can be used as food, vegetable, feed, and industrial raw material. Its yield and quality depend on the expansion degree of its bulbs and the filling condition of its starch. Little research has been done on the physiological mechanisms behind these processes, so this paper reviews the current state of knowledge on the subject. It discusses the formation and development of taro bulbs, including the process of amyloplast formation at the cellular level and changes in bulb expansion and starch enrichment at the physiological level. Environmental factors and cultivation methods are also discussed, as well as their potential impacts on taro bulb expansion. Finally, the paper proposes future research directions and focus areas related to taro bulb development. This article was authored by Erjin Zhang, when you mentioned Wei Jie Zhang and others.