The Yangtze River waterway regulation of underwater riprap, which belongs to typical concealed work, has several purposes, such as slope protection, toe protection, bottom protection, and dam construction. The main role is to strengthen the governance and protection of the bank slope and riverbed, prevent the bank collapse,bank slope and riverbed soil erosion caused by water erosion, enhance the anti-erosion ability of the river bed,stabilize the structure of river regime and riverbed, and improve the flow of the watercourse through the riprap dam conditions, so as to optimize the main channel of navigation conditions. Taking the Heishazhou sandbar waterway renovation project on the lower reach of the Yangtze River as an example, this paper probes into the underwater riprap construction technology of the Yangtze River waterway regulation project, and gives a description of the quality control links such as the stone material’s selection, gradation control, dumping process, debit measurement,and quality inspection.