Abstract: Based on the foundation pit support project of Shenzhen Taiziwan cruise center, the application of plastic concrete bite pile in slope anti-seepage of riprap foundation support project near the sea is discussed. Starting from the characteristics of plastic concrete pile, through the corresponding relationship between the modulus of plastic concrete pile, the elastic modulus of surrounding riprap foundation, the diameter of pile foundation, water level and other different factors for slope stability and finite element analysis, the influence of plastic concrete pile on slope stability and deformation is obtained. According to the analysis results, some suggestions on the anti-seepage of plastic concrete pile in slope are put forward, and the anti-seepage application of plastic concrete pile in airport and power plant of reclamation foundation is prospected.