Abstract: For the water intake construction using conventional construction methods by environmental conditions and geological conditions constraints, and environmental pollution, long construction period, high construction investment, the need for large equipment and ships and other problems, the construction technology creatively changes the traditional first inside and then outside the construction sequence, through the pre-buried underwater closed steel pipe to replace the rock plug body, water access time is not subject to the flood lag, the use of floating box water platform for taking the mouth of the pipe trough underwater excavation, pre-buried steel pipe sinking in place, underwater concrete encapsulation fixed take the mouth of the steel pipe and seepage, shore restoration and a series of process measures, with preburied steel pipe replacement of the rock plug body, not only to ensure the quality of the mouth of the penetration, construction safety, normal operation of the reservoir storage and the construction area surrounding environment and existing structures basically no. The construction area is not only safe but also has no impact on the surrounding environment and existing structures.