Stepped drainage type sidewalk pavement structure utilizing modified cement concrete

A stepped drainage type sidewalk pavement structure utilizing modified cement concrete comprises a bottom water-resisting layer, a stepped water-resisting layer arranged on the upper surface of the bottom water-resisting layer in a combined mode, an inverted stepped water seepage layer matched with the stepped water-resisting layer, a drainage port connected with the water seepage layer and an outer drainage area communicated with the drainage port. The water-resisting layer, the water seepage layer and the bottom water-resisting layer all have the gradient smaller than 5%, and the inner sides are high, and the outer sides are low. Sewage and rainwater seeping into the pavement of the sidewalk flow towards the outer side of the sidewalk under the action of gravity by utilizing the water permeability difference between the water seepage layer and the water-resisting layer and the inclined stepped structure formed by the water seepage layer and the water-resisting layer; according to the invention, residual acc