Zhangjiang sluice is a large type（1）sluice project in Ganzhou,whose reinforcement project completed its final acceptance in 2021.For the reinforcement engineering design,considering the characteristics and existing problems of the sluice,the flood discharge capacity was significantly improved by optimizing the overall layout of the sluice hub and building the sluice spillway respectively on the left side of the south bank and the north bank.By optimizing the sluice scheduling mode,combined with the reinforcement of the original stilling pool and the construction of a new secondary stilling pool,new reinforced stone cage seascape and other measures,the problem of energy dissipation and anti-flushing was fundamentally solved.In view of the good results obtained after the reinforcement of the sluice,this paper reviews and summarizes the main design technical schemes for helping the design of similar projects.