Based on crop physiology and growth process, the long model simulates the dynamic growth process of crops according to meteorological conditions, soil characteristics and crop management measures, analyzes the relevant influence factors, and optimizes the planting mode to provide suitable ones. As one of the most widely used models in many crop models, Aquacrop is mainly expounded for the development process, theoretical basis, main modules and application fields of the model, and by analyzing the representative results of the model in the simulated regional productivity at home and abroad, this paper summarizes and discusses the model in exploring suitable irrigation system, optimizing the design of crop varieties and improving the water efficiency of crops and embodying them in crop yield, providing theoretical basis and scientific guidance for experiments.