The application of non-bottom protection thin-layer riprap structure in the deep water area is increasingly widespread,but the inspection and acceptance for it stipulated in the existing code is difficult to adapt to the actual situation effectively.Based on the typical construction in the non-bottom protection thin-layer riprap construction in the 12.5 m Yangtze estuary deepwater channel phase I project Baimaosha bid I newly-built lock area,we carry out a systematic analysis of the construction technique and quality control of non-bottom protection thin-layer riprap,so as to provide reference for similar projects.