Abstract: After the third spud-in of the pilot test well-Well Ping1 of Nanbao 1-29 Gas Reservoir in Jidong Oilfield, in order to avoid leakage during the cementing operation, the conventional composite method and alloy particle method have been used for many times to plug the leakage, and the construction period has reached 21 days, resulting in a large number of material and manpower losses. Based on the analysis of the causes of lost circulation and the advantages and disadvantages of the early lost circulation technology, it is decided to adopt the high pressure lost circulation technology, and the whole process of high pressure lost circulation including slurry configuration, pump replacement, squeeze injection, and leak detection has been carried out on the site. The pressure bearing goal was achieved only once, and no loss occurred during the cementing process. The production casing cementing quality was qualified, which exceeded the quality requirements of the gas storage well cementation. This paper introduces in detail the field application of the high pressure plugging technology in the horizontal well-Well Ping1 of Nanbao 1-29 Gas Reservoir. The success rate of the well plugging at one time is 100%, which meets the pressure requirements of the cementing design at one time, and has a good prospect of popularization and application.