For the purpose of enlarging the area of the storage yard, reducing spoil transportation, beautifying the harbor environment, and cutting down the engineering cost, we propose the design scheme of 37.5 m tall high and steep slope reinforced side slope for the land formation in Chongqing Guoyuan port phase two project upstream the Yangtze River. Based on the centrifugal model test and numerical analysis, we analyze the stability of the existing No.2 and No.6 side slopes side slopes with and without reinforced slopes respectively and under the condition of slope rate variation and filling materials variation, so as to optimize the design and guide the construction.