The invention discloses an ecological seawall for multistep modular protection and relates to seawall engineering. The ecological seawall comprises a plurality of slopes and a plurality of platforms,each platform is arranged between every two adjacent slopes, and the slopes and the platforms are elevated step by step; and a plurality of wave consumption plants are arranged on each platform, all the wave consumption plants are elevated step by step, a plurality of wave consumption blocks are arranged on the surfaces of the slopes and the surfaces of the platforms, and the wave consumption blocks are protrusions. The ecological seawall has the beneficial effects that all the slopes and the platforms are elevated step by step to form the seawall structure, the wave consumption blocks are arranged on the surfaces of the slopes and the platforms in a protruding mode, the wave consumption plants are arranged on the platforms, the wave consumption blocks and the wave consumption plants are combined, thus wave prevention and wave consumption are facilitated, and the overtopping risk can be reduced; and the slopes and the platforms are arranged adjacently, thus building construction of theslopes and the platforms is relatively dependent, and the construction speed is increased advantageously.