Channel dredging sludge compounded greening planting soil and application thereof

The invention provides channel dredged sludge compounded greening planting soil and application thereof.The channel dredged sludge compounded greening planting soil comprises channel dredged sludge and greening planting soil, the greening planting soil comprises a soil modifier, organic fertilizer, calcium superphosphate, ardealite and a water-retaining agent, and the soil modifier improves the texture of the channel dredged sludge by forming a framework structure, increases the porosity of the soil and improves the water retaining property of the channel dredged sludge; the air, moisture and nutrient absorption capability of plants is improved; the water-retaining agent can prevent water and soil loss before plant growth in the early stage, and decomposition products in the later stage are carbon dioxide, water and ammoniacal nitrogen or potassium ions, so that no burden is caused to soil; by adding the soil improver, the organic fertilizer, the calcium superphosphate, the phosphogypsum and the water-retaini