The underwater concealed engineering is the key and difficult point for the quality control of the Yangtze River waterway regulation engineering. The underwater concealed engineering detection technology plays an important role in the Yangtze River waterway regulation engineering. This paper introduces the underwater concealed engineering detection technology, its classification and application in the Yangtze River waterway regulation engineering, which are of great importance for the recognition of the function of underwater concealed engineering detection technology in the Yangtze River waterway regulation engineering, and which provide reference for the maintenance engineering design of the Yangtze River waterway.