Abstract: Pore water pressure monitoring is one of the common observation activities in dams,gate slopes,river embankments,and hydropower plants,etc.Piezometers are commonly used to observe the permeable water pressure in rock masses,and the method of embedding varies in different parts.In this article,using the Neelum Jhelum hydropower project in Pakistan as an example,the construction technology of seepage piezometers for high burial depth chamber complex are studied,which is used for the construction and monitoring of different ranges of seepage piezometers.To implement the subject technology,the drilling rig is selected according to the characteristics of the borehole and geological conditions,and a reasonable drilling plan is developed.Further,the installation and backfilling of the seepage piezometer is developed according to the orientation of the seepage piezometer borehole axis,and the installation method of the comprehensive seepage piezometer is described.The data collected by the vibrating string type readout was analyzed and summarized.