Abstract: The soil washing event for Jingxi natural gas transmission pipeline has been analyzed. On the basis of the analytical results, an effective hydrotechnological protection method, including shore protection, bank protection and radial flow dredging, is given in detail. The authors consider that this method not only ensures the safe operation for the pipeline, but also protects the local environment and restore the land to till, which can speed up the pipeline construction and obtain economic profits. In the light of some issues existed in the hydrotechnological protection, the authors provide several suggestions and measures.