A detailed introduction to the research status and the main achievements at home and abroad on hydraulic non-bar structures has been made, a completed and systemic summarization on the existing problems and the difficulties in the research has been described, the main contents and the key areas for further research have been proposed, and a completed and detailed suggestion on the research method and technical approach has been established. The conclusion achieved will provide the research extension with more theoretic and constructive instruction, which can be considered as a basis for the further development of related research.