Abstract: Because the expansive soil has the characteristics of water loss and water loss, the expansive soil slope generally has the characteristics of slow sliding. Even if the slope tends to be stable, once influenced by the outside world, moisture changes resulting from the shrinkage crack will also cause sliding intensified development of pile foundation produced larger decline in force, resulting in bridge structural damage, bring huge losses. Therefore, in the expansive soil landslide governance, in addition to layout reasonable anti slide structure, take effective seepage control and drainage measures to try to reduce bank soil humidity change are equally important. The through an example of a large bridge project of expansive soil slope leading to the destruction of the bridge, and through comparison of several schemes, gives the anti sliding pile with composite geotechnical membrane isolation moisture with expansive soil landslide governance ideas and methods to solve the bridge safety hidden trouble, and achieved good control effect, prevention and control Countermeasures for similar projects for reference.