Abstract: The supercritical water-cooled reactor（SCWR） has been selected as one of the most promising reactors for Generation Ⅳ nuclear reactors due to its higher thermal efficiency and more simplified structure compared to state-of-the-art LWRs.However,its higher outlet temperature and higher temperature difference between inlet and outlet bring much challenge to the design of SCWR fuel assembly.In this paper,the present status of supercritical fuel assembly design at home and abroad is studied and a kind of fuel assembly with two-flow structure applying for cruciform control rod is proposed.The results show that,the design basically meets the requirements of fuel assembly design,which has good performance.