Abstract: Ammonia is a highly efficient hydrogen energy carrier,which can effectively solve the safety and economic difficulties in the process of hydrogen energy transport. Nuclear energy-iodine sulfur thermochemical cycle hydrogen production is a feasible way to realize pollution-free large-scale industrial green hydrogen production. The current research on nuclear-iodine sulfur thermochemical cycle hydrogen production focuses on the nuclear-thermal coupling problem, without considering the hydrogen transport problem after generation. Based on this,a novel model of nuclear-ammonia-hydrogen is proposed. In this model firstly hydrogen is produced from nuclear energy and then it is converted into ammonia by nuclear heat. This model optimizes the utilization of nuclear heat and solves the hydrogen storage and transportation problem. The entire process was simulated by Aspen Plus software and the energy consumption,thermal efficiency and cost are analyzed.