The seismic analysis on the intake tower in the Shuibuya Hydropower Station was performed with the aid of 3 - D FEM program, i.e., Ansys software. The self - vibration characteristics of the structure can be got，and seismic behaviors including deformation, stress and acceleration distribution of this tower can be calculated. By the superposed results of dynamical and static calculations, the seismic security of the tower can be evaluated so as to supply reliable data for project designers.