Abstract: To improve the ability of identifying,preventing and controlling the water damage disaster in long-distance buried pipelines,a semi-structured evaluation model for the risk of long-distance pipeline water damage disaster was established.Firstly,the characteristics of long-distance pipeline water disaster was analyzed,the susceptibility and vulnerability factors of water disaster risk was summarized,and a water damage risk evaluation indices system was established.Then,based on the evaluation indices,the semi-structured treatment method was determined.A FAHP comprehensive evaluation model to classify the risk of pipeline water damage was constructed.Finally,10 sections of the Sichuan-East Gas Pipeline Relocation Project were selected as the evaluation objects,and the risk indices of vulnerability and vulnerability were semi-structured,and the risk of water damage was evaluated.The results showed that the overall risk of the project was high,and the risk level of some pipelines was high risk.It was necessary to optimize the risk factors of pipeline water damage according to the hierarchical management and control plan and improve the project safety management level.The semi-structured evaluation method proposed in this paper can effectively evaluate the current status of long-distance buried pipeline water damage disaster and provide theoretical support for pipeline water damage disaster management.