Three layout schemes for the second and third line ship lock of Feillaixia hydrojunction project are compared and analyzed from aspects of water-borne traffic, ship lock layout space, flow condition for navigation, influence on the original project’s flood control function, construction difficulty, area of land expropriation, and project investment, etc. The research results indicate that the left shore scheme could not meet the construction requirements forinenough layout space and the construction period′s serious interference with the power station, the water release sluice, and serious disturbance upon the operation management of the first line ship lock. Compared with the middle line scheme, the right shore scheme has an advantage in the less project investment, smaller influence on the flood control function and better construction condition, etc.Therefore, the right shore scheme is recommended as the construction scheme.