The operating and dispatching principle of the navigation regulating lock is obviously different from that of the conventional lock engineering and sluice engineering.For the key technical issues such as the entrance width,threshold depth,gate type,and plane layout of the navigation regulating lock,there is no concrete stipulation in the specifications of the lock engineering and sluice engineering.Taking the reconstruction project of Denglou regulating lock as an example,we adjust the existing operating and dispatching principle for the regulating lock to meet the requirements of opening the lock for navigation and implement the engineering compensation measures to guarantee the functions including prevention of floods,diversion irrigation,and protection of water quality.By theoretical calculation and comparative analysis,we know that by constructing a 2-hole regulating lock with 23 m net width and 5.5 m-deep threshold water depth,we can meet the requirement of safe navigation of ships and satisfy the passing capacity of fairways. The conclusion is drawn that the elevated horizontal plane gate adapts to the characteristics of the long-term low-water head operation and high navigation guarantee rate.Its method of determining the operation rules,construction scale,gate type,and layout plan may serve as reference for the construction of similar projects and improvement of lock standards and specifications.