Taking the promotion and reformation engineering of a gravity terminal in Humen，Guangdong province as the study case,new technology for terminal renovation,i.e. placing a row of piles along the quayside to strengthen the foundation and satisfy the dredging requirement of foundation frontier. The slope calculation software of GEO-SLOPE and finite element calculation software of PLAXIS2D are adopted respectively to calculate the overall stability,structural internal force and deformation to guarantee the terminal’s structural safety.