The invention discloses a rubbish landfill site intermediate covering layer and a preparation method and application for the rubbish landfill site intermediate covering layer and belongs to the technical field of rubbish landfill. The intermediate covering layer comprises at least three layers of function layers arranged in a stacked manner, each function layer comprises a water storage layer, a discharge guiding layer and a low permeability layer from outside to inside in sequence, the water storage layers are mainly composed of recycled fine aggregate with the particle size being less than 5mm, the discharge guiding layers are mainly composed of recycled coarse aggregate with the particle size being 10-40 mm, the low permeability layers are mainly composed of renewable powder with the particle size being less than 2 mm, and the recycled fine aggregate, the recycled coarse aggregate and the renewable powder are all obtained by processing building rubbish. By means of the intermediatecovering layer, mechanical properties of a rubbish body are improved, and the intermediate covering layer provides a certain degree of anti-permeability and air-tight function serving as temporary covering, because used materials are all landfill building rubbish in landfill sites, 'filling rubbish with rubbish', recycling utilization of the building rubbish is realized, and the rubbish landfillsite intermediate covering layer and the preparation method and application for the rubbish landfill site intermediate covering layer have the characteristics of being convenient to draw materials, low in cost, capable of saving energy, environmentally friendly, good in durability and the like.