By analyzing the damage and leakage of the wicket gate seal for Baishan hydropower plant,it is presented that the main reason of leakage is applying nylon bearing bush.

• 对白山电站水轮机导叶密封损坏和漏水原因进行了分析,指出了尼龙导叶轴套的不适用是导叶密封漏水、损坏的重要原因。