Xiangjiang Tugutang navigation-power junction is the last cascade of Xiangjiang River Main Stream Waterway Planning (2007),and an important project of Hunan Water Transport Development Plan (2011) as well.So,its construction is very important for the development of Hunan inland waterway.This paper not only analyzes the general layout and engineering characteristics of Tugutang shiplock,but also summarizes the innovation and optimization for the shiplock design:1) in order to optimize the conditions of construction diversion,the pile-column-inserted plate water diversion wall and the chamber wall with the cofferdam function are used;2) the optimization design considering the second-line shiplock requirement by optimizing the first-line shiplock,the hollow-main navigation wall and the bidirectional pier structure are used;3) for improving the landscape of shiplock area,the structure design of lock head is optimized,including arrangement of pipeline corridor in the up-lock head,adjustment of the arrangement of the hoist room in the low-lock,and decrease of the top elevation of the low-lock head.