The mitre gate of Zhuzhou second ship lock is a super-large gate.The deformation control of the gate is a key and difficult point in the design.The lock hoist is centrally arranged on the upper part of the lock head,and the convenience of hoisting and maintenance should be fully considered.The structure of the gate is arranged by various schemes,and the structural calculations are carried out separately.The ability of the structure itself to resist deformation is emphatically studied,and the accessory of the gate is optimized.The hoist is arranged by two schemes,and the advantages and disadvantages are compared,the factors such as lifting,overhaul,passage and beauty are mainly considered.The results show that the stiffness of the main beam+eight partitions+horizontal secondary beam of the gate is the best,and the protection system and the pedestrian bridge are more reasonable after optimizing design.The hoist is arranged with the scheme of empty box structure+lifting hole electric cover plate,which achieves convenient lifting,overhaul and access.