Abstract: One of the important links in the chain of pipeline construction is hydrotechnological protection. However, the pipeline suffered inundation due to neglecting the hydrotechnological protection after the pipeline was put into operation. In the light of the problem, the paper analyzes the common phenomena and causes of pipeline damage from inundation, and sets forth some practical hydrotechnological protection methods. It is suggested that only after taking different hydrotechnological protection measures in accordance with the different conditions should good protection effect be achieved.